लंबी पूंछ वाले गाइड, प्रति इरादा एक पृष्ठ।
AI एजेंटों में भुगतान, पहचान और खर्च नीतियों को जोड़ने के बारे में विशिष्ट प्रश्नों के लक्षित उत्तर।
problem solution
Confirming an agent payment: the fix
To confirm an agent payment, treat the payment.received or payment.sent webhook as the source of truth, use transactions.get for a specific payment, and the block explorer for an independent check.
Handling an agent payment dispute: the fix
x402 USDC settlement is final, with no built-in chargeback, so agent payment disputes are handled by prevention, off-chain resolution, and an optional refund as a separate payment, not on-rail.
Refunding an agent payment: the fix
Because agent payments settle finally, a refund is a separate payment back to the original payer, not a reversal. Send USDC to the payer's address for the refund amount and record it.
Tracking agent payments for tax: the fix
To track agent payments for tax, build a dollar-denominated ledger from the payment webhook events, attributed per agent, with the fields your accountant needs. This is records, not tax advice.
AI agent needs to receive stablecoin: the fix
To let an AI agent receive stablecoin payments, gate a route with the x402 adapter to earn per call, or share its profile link for one-off payments. USDC lands in the agent's wallet.
Paying an agent for a task: the fix
To pay an agent for completing a task, gate the task's endpoint with x402 so one paid call runs the task in USDC. Note that x402 settles before the work runs, so plan for that honestly.
Agent-to-API payment: the fix
Agent-to-API payment has two sides: an agent paying an API by settling its HTTP 402, and an API charging agents by gating its route. Both run on x402, so they interoperate.
AI agent wallet recovery: the fix
With a managed agent wallet there is no seed phrase to lose, so recovery is account-level: secure your account, manage API keys, and rotate or revoke a compromised key. Self-custody differs.
AI agent cannot pay for an API: the fix
If your AI agent stalls when an API requires payment, the fix is a wallet plus the x402 client, so the agent settles the HTTP 402 in USDC and retries. Symptom, cause, and solution.
AI agent crypto wallet setup: the fix
Setting up a crypto wallet for an AI agent is not the seed-phrase path you know. The fix is a managed per-agent wallet: provision it, fund it with USDC, and set a spend limit, no key handling.
AI agent needs a payment identity: the fix
If counterparties hesitate to transact with your anonymous AI agent, the fix is a verifiable payment identity: a public profile with verified email, GitHub, and domain badges linked to its wallet.
AI agent has no spending controls: the fix
If your AI agent can pay but nothing bounds what it spends, the fix is a server-side spend policy, a per-transaction cap and a period allowance, enforced where the agent cannot override it.
AI agent is overspending: the fix
If your AI agent is spending more than expected, stop it now by tightening or revoking its spend limit, diagnose the cause from the payment trail, then right-size the policy to prevent recurrence.
AI agent pay-per-call setup: the fix
To make an AI agent pay per call rather than on a subscription, set up the x402 client, which is inherently per-call: wrap it in a tool, fund the wallet, and size the spend limit per call.
AI agent payment not confirming: the fix
If a payment settled but you cannot tell, the fix is to rely on the payment webhook as durable confirmation, verify its signature, and check a specific transaction with transactions.get.
AI agent payment not going through: the fix
If an agent payment is failing, identify which of four kinds it is, a spend-limit refusal, insufficient balance, a transient settle error, or an upstream failure, and respond to that kind.
AI agent payment webhook: the fix
To know when agent payments happen, set up a webhook: create it, listen for payment.received and payment.sent, and verify each delivery with webhooks.verify against the raw body.
AI agent needs to receive tips: the fix
To let your AI agent receive tips or voluntary payments, share its public profile URL, which doubles as a payment link anyone can use to send USDC, no x402 gating required.
Autonomous agent budget control: the fix
Controlling an autonomous agent's budget takes more than a one-time limit: enforce a server-side spend policy, let the agent read it to plan, and monitor and adjust over time.
MCP server has no monetization: the fix
If your MCP server gives away valuable tools for free with no way to charge, the fix is to serve it over Streamable HTTP and gate the route with the x402 adapter, charging per call in USDC.
use case
Agent-to-agent commerce
Agent-to-agent commerce is agents buying and selling services from each other as an economy, settling per call in USDC over x402. A use-case guide to its patterns and how to participate.
AI agent sponsorship
Sponsoring an AI agent means backing it with a larger, deliberate payment, sent in USDC to its profile link. A use-case guide to who sponsors, why, and how it differs from tipping.
AI agent tipping
Tipping AI agents lets people support agents they find useful with voluntary USDC payments through the agent's profile link. A use-case guide to who tips, why, and how to enable it.
AI agent treasury management
Managing money across a fleet of AI agents: fund wallets with USDC, bound each with a spend limit, monitor balances and flows, reconcile against the chain, and off-ramp surplus.
API monetization for AI agents
Turn your API into one AI agents pay per call: gate its routes with the x402 adapter so agents settle in USDC with no signup, opening a new market of machine customers. A use-case guide.
MCP server monetization guide
A guide to monetizing an MCP server end to end: decide what to charge for, gate it with x402 over Streamable HTTP, and operate it, with USDC settling per call. The connective overview.
Paid AI agent task marketplace
Build a marketplace where AI agents offer paid tasks and other agents hire them: each task endpoint is gated with x402, agents pay per task in USDC, and identity establishes trust.
Paid coding agent
Monetize a coding agent: charge per task by gating its endpoint with x402, so callers pay in USDC for generated code. A use-case guide to pricing by complexity and the role of tests.
Paid content-generation agent
Monetize a content-generation agent: charge per piece by gating its endpoint with x402, so callers pay in USDC for produced content. A use-case guide to pricing by type and handling revisions.
Paid customer-support agent
Monetize a customer-support agent: charge per query handled by gating its endpoint with x402, so businesses pay in USDC for support handled. A use-case guide to pricing and escalation.
Paid data-analysis agent
Monetize a data-analysis agent: charge per analysis by gating its endpoint with x402, so callers pay in USDC for insight from their data. A use-case guide to pricing and handling input.
Paid prompt-engineering agent
Monetize a prompt-engineering agent: charge per optimized prompt by gating its endpoint with x402, so callers pay in USDC for improved prompts. A use-case guide to pricing and packaging.
Paid research agent
Monetize a research agent: charge per research task by gating its endpoint with x402, so callers pay in USDC for sourced findings. A use-case guide to pricing depth and packaging citations.
Paid summarization agent
Monetize a summarization agent: charge per summary by gating its endpoint with x402, so callers pay in USDC for condensed text. A use-case guide to pricing by length and setting scope.
Paid translation agent
Monetize a translation agent: charge per word or per document by gating its endpoint with x402, so callers pay in USDC for translated text. A use-case guide to pricing by language and volume.
integration
Agno भुगतान एकीकरण
How payments fit into Agno: package payment as an Agno Toolkit whose tools pay x402 endpoints in USDC on Base through a local Node proxy, with per-agent wallets across a team.
AutoGen भुगतान एकीकरण
How payments fit into AutoGen: agents pay x402 endpoints in USDC on Base through a local Node proxy, and a crew can earn via a Node gateway. The integration reference.
AutoGen wallet tool
Give an AutoGen agent a reusable wallet tool: a function registered for LLM and execution that pays x402 endpoints in USDC on Base through a small local Node proxy.
CrewAI monetization
Turn a CrewAI crew into a paid service: gate its HTTP endpoint with the @blockchain0x/x402 server adapter via a small Node gateway, settling USDC on Base per call.
CrewAI भुगतान एकीकरण
How a CrewAI crew pays in USDC on Base: each agent gets a wallet via a local x402 proxy. Compatibility, surface area, and crew-specific per-agent patterns.
CrewAI wallet tool
Give a CrewAI agent a reusable wallet tool: a BaseTool that pays x402 endpoints in USDC on Base through a small local proxy built on @blockchain0x/x402.
DSPy payment integration
How payments fit into DSPy: a dspy.Tool in a ReAct module pays x402 endpoints in USDC on Base through a local Node proxy, while optimizers tune prompts and payment stays deterministic.
Haystack payment integration
How payments fit into Haystack: a custom component in your pipeline pays x402 endpoints in USDC on Base through a local Node proxy, so a paid source slots into RAG like any other.
LangChain भुगतान एकीकरण
How LangChain agents pay in USDC on Base: wrap the @blockchain0x/x402 client in a Tool. Compatibility, the full surface area, and the trade-offs versus rolling your own.
LangChain stablecoin payments
Why LangChain agents pay in USDC, a dollar-pegged stablecoin on Base, and how it works: stable pricing the planner can reason about, sub-cent calls, via @blockchain0x/x402.
LangChain wallet tool
Give a LangChain agent a reusable wallet tool: a DynamicStructuredTool that pays x402 endpoints in USDC via @blockchain0x/x402 and reads the agent's spend limit.
LangGraph payments
How payments fit into LangGraph: a tool node pays x402 endpoints in USDC on Base, and you can model payment as an explicit graph node with budget carried in state. The integration reference.
LangGraph wallet
Give a LangGraph app a reusable wallet tool: a tool in your ToolNode that pays x402 endpoints in USDC on Base, plus a balance read that feeds budget into graph state.
LlamaIndex भुगतान एकीकरण
How payments fit into LlamaIndex: a TypeScript agent uses the x402 client directly, a Python agent calls a local Node proxy, and a query engine can earn via a gateway. All in USDC on Base.
LlamaIndex wallet tool
Give a LlamaIndex agent a reusable wallet tool: a FunctionTool that pays x402 endpoints in USDC on Base, so the agent can pay per retrieval and feed paid data into its context.
MCP paid tools
How to charge for MCP tools: x402 pricing is per route, not per tool, so you map paid tools to priced routes and keep discovery free. Settles USDC on Base per call.
MCP payment server
The architecture of a payment-enabled MCP server: a Streamable HTTP transport gated by the @blockchain0x/x402 adapter, serving free discovery and paid routes, settling USDC on Base.
MCP server monetization
Turn an MCP server into a paid service with @blockchain0x/x402. Route-level pricing, a real 402, X-Payment verification, and per-call settlement in USDC on Base.
n8n AI agent payments
How payments fit into n8n: an AI Agent node calls an HTTP Request tool pointed at a small x402 service to pay in USDC on Base, and a webhook workflow earns via a gateway.
OpenAI Agents SDK payments
Add payments to agents built on the OpenAI Agents SDK. Wrap the @blockchain0x/x402 client in a tool (TypeScript) or call a local proxy (Python), with per-agent wallets.
OpenAI Agents SDK wallet
Give an OpenAI Agents SDK agent a reusable wallet tool that pays x402 endpoints in USDC on Base, and share it across a handoff chain with per-agent wallets.
Pydantic AI payments
How payments fit into Pydantic AI: an agent pays x402 endpoints in USDC on Base through a local Node proxy injected via typed dependencies, and a Pydantic AI service can earn via a gateway.
Pydantic AI wallet
Give a Pydantic AI agent a reusable wallet tool: a standalone Tool that pays x402 endpoints in USDC on Base, shared across agents with per-agent wallets via typed deps.
Semantic Kernel payments
How payments fit into Semantic Kernel: a payment plugin's kernel function pays x402 endpoints in USDC on Base through a local Node proxy, and a kernel can earn via a gateway.
Zapier AI agent payments
How payments fit into Zapier: a Zap calls a deployed x402 service with Webhooks by Zapier to pay in USDC on Base, and a Catch Hook Zap earns via a gateway. Secure the public service.
best x
AI agent payment providers in 2026
A 2026 snapshot of AI agent payment providers and what changed this year: x402 becoming a de facto standard, card networks entering agentic commerce, and stablecoin maturation.
AI agent wallet tools list for 2026
A curated list of the wallet tools to give an AI agent: pay-by-calling, read the spend limit, look up a transaction, and a balance view, plus what to deliberately leave out.
Best AI agent identity platform in 2026
An honest comparison of AI agent identity approaches: Blockchain0x verifiable profiles, W3C DIDs, OAuth and API keys, platform-native identity, and on-chain identity. Verifiability and payment links.
Best blockchain for AI agents in 2026
An honest comparison of blockchains for AI agent payments: Base, Ethereum mainnet, Solana, Polygon, and Arbitrum. Why low fees and native USDC make Base the default for x402.
Best crypto payment platform for developers in 2026
An honest comparison of crypto payment platforms for developers: Blockchain0x, Coinbase, Circle, Stripe stablecoin, and hosted crypto processors. Human checkout versus machine payments.
Best LangChain tools for payments in 2026
The LangChain tool constructs to use for payments and the payment tools to build with them: DynamicStructuredTool, the Python tool wrapper, a pay tool, a spend-limit read, and LangGraph nodes.
Best MCP server payment solution in 2026
An honest comparison of ways to charge for an MCP server: x402 per-call USDC, roll-your-own x402, API-key subscriptions, metered billing, and marketplace billing. Which fits machine callers.
Best payment API for AI agents in 2026
An honest comparison of payment APIs for AI agents: Blockchain0x, Coinbase Developer Platform, Circle, Stripe, and rolling your own x402. Which fits paying, earning, and per-agent attribution.
Best payment platform for agentic commerce in 2026
An honest comparison of agentic commerce platforms: Blockchain0x x402, Stripe Agentic Commerce, Visa and Mastercard agent credentials, PayPal, and Coinbase. Card rail versus crypto rail.
Best stablecoin for AI payments in 2026
An honest comparison of stablecoins for AI agent payments: USDC, USDT, PYUSD, DAI/USDS, and USDe. Why USDC on Base is the practical default for x402, and when others fit.
Best tools to monetize an AI agent in 2026
An honest comparison of tools to monetize an AI agent: x402 per-call gating, subscription billing, metered billing, payment links, and marketplace distribution. Which fits your buyers.
Best USDC wallet for developers in 2026
An honest comparison of USDC wallets for developers: Blockchain0x agent wallets, Circle Programmable Wallets, Coinbase, wallet-as-a-service, and self-custody. Managed versus self-custody.
Best wallet for AI agents in 2026
An honest comparison of the wallet options for AI agents: Blockchain0x, Coinbase Smart Wallet, Circle Programmable Wallets, AWS AgentCore, MetaMask/EOA. Which fits which workload.
Best way to accept payment from an AI agent in 2026
An honest comparison of ways to accept payment from an AI agent: the x402 server adapter, lower-level x402, a payment link, a direct wallet, or a marketplace. Which fits per-call versus one-off.
Best way to pay an AI agent in 2026
An honest comparison of ways to pay an AI agent: x402 per-call, a payment link, a direct wallet transfer, agent-to-agent, or a fiat on-ramp first. Which fits paying for a service versus a one-off.
Best x402 implementation in 2026
An honest comparison of x402 implementations: Blockchain0x, the Coinbase reference, community ports, rolling your own, and starter templates. They interoperate, so choose on ergonomics.
Top AI agent payment platforms in 2026
A map of the AI agent payment landscape in 2026, organized into five categories: x402-native, agent-native startups, stablecoin infrastructure, card-network agentic, and crypto processors.
Top MCP monetization tools in 2026
The toolkit for monetizing an MCP server: the x402 server adapter, the route-level pricing map, the Streamable HTTP transport, a free discovery route, webhooks, and testnet. What each does.
Top stablecoin payment APIs in 2026
An honest comparison of stablecoin payment APIs by capability: Blockchain0x x402, Circle, Coinbase, Stripe stablecoin, and low-level transfer APIs. Per-call settlement, cross-chain, and wallets.
Top tools for agentic payments in 2026
The developer toolkit for agentic payments: the x402 client, the server adapters, the wallet SDK, webhooks, spend-limit reads, and testnet tooling. What each tool does in a build.
comparison
Base vs Solana for AI agents: an honest comparison
How Base and Solana compare for AI agent payments: both are low-fee with native USDC, but differ on EVM versus non-EVM tooling, throughput, and which x402 rail settles where.
Blockchain0x vs Circle agent stack: an honest comparison
Blockchain0x and Circle's agent stack sit at different layers: x402 agent payments with per-agent control versus USDC issuance, custody, and wallet infrastructure. Often complementary, not rivals.
Blockchain0x vs Coinbase x402: an honest comparison
Blockchain0x and Coinbase both use the open x402 protocol, so they interoperate. The comparison is the surrounding layer: per-agent identity and spend limits versus rails and ecosystem.
Blockchain0x vs Nevermined: an honest comparison
How Blockchain0x and Nevermined compare for AI agent payments: open x402 per-call settlement and per-agent wallets versus AI-native payment and monetization infrastructure. When each fits.
Blockchain0x vs Payman AI: an honest comparison
Blockchain0x and Payman AI differ on the autonomy model: autonomous per-call USDC payments bounded by spend limits versus agent payments with human-in-the-loop oversight. When each fits.
Blockchain0x vs Skyfire: an honest comparison
How Blockchain0x and Skyfire compare for AI agent payments: open x402 settlement and per-agent wallets versus an agent payment network with Know-Your-Agent identity. When each fits.
Blockchain0x vs Stripe: an honest comparison
Blockchain0x and Stripe serve different payers: autonomous machine per-call USDC payments over x402 versus mature human-facing checkout with maturing agentic and stablecoin features.
Crypto vs fiat for agent payments: an honest comparison
How crypto and fiat compare for AI agent payments. For agents, crypto means stablecoins, not volatile assets, so the real question is on-chain stablecoin settlement versus fiat banking rails.
Nevermined alternative: evaluating your options in 2026
Looking for a Nevermined alternative for AI agent payments and monetization? What to look for, how Blockchain0x compares as an x402-native option, and a fair look at the field.
Payman alternative: evaluating your options in 2026
Looking for a Payman AI alternative for agent payments? Why you might want more autonomy, what to look for, and how Blockchain0x fits with spend-limit-bounded autonomous payments.
Self-hosted vs managed agent wallet: an honest comparison
How self-hosted and managed agent wallets compare: full control and key custody you own versus managed keys with spend limits and identity supplied. The control-versus-burden tradeoff.
Skyfire alternative: evaluating your options in 2026
Looking for a Skyfire alternative for AI agent payments? What to look for, how Blockchain0x compares as an x402-native option, and a fair look at the wider field.
Stripe for AI agents alternative in 2026
Looking for a Stripe alternative for autonomous AI agent payments? Why Stripe fits human checkout, what an agent-native alternative needs, and how Blockchain0x fits. Often you keep both.
USDC vs credit card for AI agents: an honest comparison
How USDC and credit cards compare as the payment instrument for AI agents: a wallet an agent holds and spends programmatically versus a card built for human authentication. When each fits.
x402 vs traditional payment: an honest comparison
How x402 and traditional payment rails compare: per-call stablecoin settlement with no signup versus card and bank rails with accounts, chargebacks, and broad acceptance. When each fits.
how to
How to accept stablecoin payments as an agent
Let an AI agent accept USDC, a dollar-pegged stablecoin, on Base. Why stablecoins fit agent payments, and how to accept them with @blockchain0x/x402.
How to add crypto payments to an API
Add crypto payments to an HTTP API the modern way: USDC on Base, per call, via x402 with @blockchain0x/x402. Why this beats posting a wallet address, and how to wire it.
How to add payments to an AutoGen agent
Give an AutoGen agent a USDC wallet. Run a small x402 proxy with @blockchain0x/x402 and call it from an AutoGen function tool, settling paid calls on Base.
How to add payments to a CrewAI agent
Give a CrewAI agent a USDC wallet. Run a small x402 proxy with @blockchain0x/x402, call it from a CrewAI tool, and settle paid calls on Base.
How to add payments to a LangChain agent
Give a LangChain agent a USDC wallet with @blockchain0x/x402. Wrap a paid API in a tool, auto-pay on HTTP 402, verify the webhook, and bound spend.
How to add payments to a LlamaIndex agent
Give a LlamaIndex agent a USDC wallet. Run an x402 proxy with @blockchain0x/x402 and call it from a FunctionTool, settling paid calls on Base.
How to add payments to an MCP server
Add x402 payments to an MCP server with @blockchain0x/x402. Mount the plugin on your HTTP route, return a real 402, verify X-Payment, and settle in USDC.
How to add payments to an OpenAI agent
Add USDC payments to an agent built on the OpenAI Agents SDK. Wrap the @blockchain0x/x402 client in a tool (TypeScript) or call a Node proxy (Python). Ship in 15 minutes.
How to add payments to a Pydantic AI agent
Give a Pydantic AI agent a USDC wallet. Run an x402 proxy with @blockchain0x/x402 and call it from a typed tool, settling paid calls on Base.
How to add USDC payments to an AI agent
Make an AI agent pay in USDC on Base with @blockchain0x/x402. Wire the x402 client, settle a 402 automatically, fund the wallet, and cap spend. Framework-agnostic.
How to add a wallet to my agent
Give an AI agent its own USDC wallet on Base with @blockchain0x/node. Create the agent, confirm the wallet, fund it on testnet, and let it pay through x402.
How to add a webhook to an AI agent
Wire payment webhooks for an AI agent with @blockchain0x/node. Create the endpoint, verify deliveries with webhooks.verify, handle payment events, and rotate the secret.
How to add x402 to my API
Add x402 micropayments to an existing HTTP API with @blockchain0x/x402. Mount the Fastify plugin or Express middleware, price a route, and accept USDC per call on Base.
How to build a paid AI agent
Build an AI agent that earns from scratch: create its wallet, expose a service, gate it with @blockchain0x/x402, and get paid in USDC on Base. End to end.
How to build a paid MCP server
Build an MCP server that charges per call from scratch: expose tools over the Streamable HTTP transport, gate the premium route with @blockchain0x/x402, settle USDC on Base.
How to build an autonomous payment agent
Build an agent whose job is to spend: wire createX402Client, give it a decision loop, and bound it with a wallet-enforced limit so it pays for what it needs on its own.
How to build an MCP server with payments
A follow-along tutorial: build one paid MCP tool from an empty folder to a working server, gated with @blockchain0x/x402 and settling USDC on Base.
How to charge for AI agent services
Structure charges for an AI agent's services with @blockchain0x/x402: price per route, run free and paid tiers, and settle each call in USDC on Base.
How to create a payment link for an AI agent
Get a shareable payment link for an AI agent: its public profile at wallet.blockchain0x.com/a/{slug}, where anyone can pay it in USDC on Base, plus when to use x402 instead.
How to debug an x402 payment
Debug x402 payment problems by symptom: a 402 that never gets paid, signature failures, wrong-network errors, and the real X402WireError codes from @blockchain0x/x402.
How to give an AI agent a payment identity
Give an AI agent a public payment identity counterparties can check: a profile at wallet.blockchain0x.com/a/{slug}, a verifiable wallet address, and trust badges.
How to handle agent-to-agent payments
Let one AI agent pay another in USDC on Base. The payer uses @blockchain0x/x402's client; the payee gates its route with the server adapter. Each agent keeps its own wallet.
How to handle failed agent payments
Handle an AI agent's failed payments well: classify the failure (refused, insufficient funds, settle error, upstream), respond to each correctly, and never retry blindly.
How to implement the x402 protocol
Understand and implement the x402 handshake with @blockchain0x/x402: the 402 body, the X-Payment header, and the wire helpers parse402Response and parsePaymentHeader.
How to let an AI agent pay autonomously
Let an AI agent pay without a human in the loop, safely. Wire createX402Client, bound it with a wallet-enforced spend limit, and handle refused payments in the agent loop.
How to monetize an AI agent
Turn an AI agent into a revenue source. Decide what is worth charging for, gate it with the @blockchain0x/x402 server adapter, price per call, and settle in USDC on Base.
How to monetize an MCP server
A decision framework for turning a free MCP server into a paid service. Which tools to gate, what to charge, when to ship, and the day-one metrics that tell you if pricing is right.
How to onboard an AI agent to stablecoin payments
The end-to-end path to get an AI agent transacting in USDC on Base: create it, fund the wallet, make a first payment, set a limit, and verify, in order.
How to pay an AI agent with crypto
Pay an AI agent in USDC on Base. Call its paid service through the @blockchain0x/x402 client, or send USDC straight to its wallet, and confirm the payment landed.
How to prevent an AI agent from overspending
Stop an AI agent overspending: understand the failure modes (runaway loops, retry storms, price drift) and the controls that bound them, with @blockchain0x/node.
How to receive payments as an AI agent
Let an AI agent get paid in USDC on Base. Receive directly to its wallet, watch payment.received webhooks, or charge callers with the @blockchain0x/x402 server adapter.
How to receive USDC on Base
Receive USDC on Base for an AI agent: get the wallet address, fund on Base Sepolia, watch payment.received, and understand chain IDs and finality on Base.
How to secure AI agent payments
Secure an AI agent's payments end to end: wallet-enforced spend limits, key hygiene, verified webhooks, and prompt-injection defense with @blockchain0x/node.
How to set a spend limit on an AI agent
The fast path to capping an AI agent's spend: set a per-transaction cap and a period allowance in the dashboard, confirm them over the API, done in five minutes.
How to set up agent spending limits
Set a per-transaction cap and a per-period allowance on an AI agent's wallet. Dashboard-managed, API-readable, enforced before settlement so prompt injection cannot lift them.
How to set up a public wallet for an AI agent
Give an AI agent a public, payable wallet: a profile at wallet.blockchain0x.com/a/{slug} that shows its address and verification, so anyone can pay it in USDC on Base.
How to show an AI agent's trust and verification
Make an AI agent's trust visible to counterparties: surface its verified profile at wallet.blockchain0x.com/a/{slug}, link it everywhere it transacts, so payers can check before they pay.
How to test agent payments
Test an AI agent's payments safely on Base Sepolia: fund from a faucet, exercise the happy path, refused payments, and webhook verification before any real USDC moves.
How to track an AI agent's transactions
Track every payment an AI agent makes and receives: build a ledger from payment.sent and payment.received webhooks, confirm with transactions.get, reconcile on-chain.
How to verify an AI agent's identity
Earn the trust badges on an AI agent's profile: verify email, GitHub, and domain so counterparties can trust the wallet before they pay it or accept its payment.
glossary
What is a paid MCP tool?
A paid MCP tool is a tool on an MCP server that a caller must pay to use, gated with x402 so a call returns a 402 until payment settles in USDC. A clear definition with the route-level reality.
What is a payment mandate?
A payment mandate is a delegated, bounded authorization that lets an agent make payments on a principal's behalf within defined rules. A clear definition for agentic commerce.
What is a session key?
A session key is a scoped, often temporary cryptographic key authorized to sign a limited set of transactions for a wallet, within constraints, without exposing the wallet's main key. A definition.
What is agent payment identity?
Agent payment identity is the verifiable identity attached to an AI agent so a counterparty can know which agent it is transacting with, and who stands behind it, before accepting payment.
What is agent-to-agent payment?
Agent-to-agent payment is one AI agent paying another for a service, with no human in either loop, typically settled per call in USDC over x402. A clear definition.
What is agentic commerce?
Agentic commerce is buying and selling where an AI agent is a party to the transaction, paying for goods or services or being paid for them. A clear definition with its shapes and needs.
What is an agent spend policy?
An agent spend policy is the set of server-side rules that bound how much an AI agent can spend, a per-transaction cap and a per-period allowance, enforced where the agent cannot override them.
What is an AI agent wallet?
An AI agent wallet is a wallet provisioned for an autonomous AI agent to hold and spend funds programmatically, bounded by a spend limit, often with its own identity. A clear definition.
What is an MCP server?
An MCP server implements the Model Context Protocol to expose tools, resources, and prompts to AI applications in a standard way, so agents can discover and call them. A clear definition.
What is the AP2 protocol?
AP2, the Agent Payments Protocol, is an open protocol for authorizing AI agent payments using signed mandates as verifiable credentials, designed to work across payment methods. A clear definition.
What is Coinbase Smart Wallet?
Coinbase Smart Wallet is a smart-contract wallet from Coinbase with passkey sign-in instead of seed phrases, designed for easy onboarding and programmable features. A clear definition.
What is machine-to-machine payment?
Machine-to-machine payment is a payment between automated systems with no human in the loop, made practical for software by per-call settlement in stablecoins over x402. A clear definition.
What is a spend permission?
A spend permission is the readable record of how much an agent is allowed to spend: the per-transaction cap, period allowance, and validity window that express its enforced spend policy.
What is a stablecoin payment rail?
A stablecoin payment rail is the end-to-end path for moving value as a stablecoin on a blockchain, used as a payment network: the token, the chain, and the settlement mechanism. A definition.
What is x402?
x402 is an open protocol that uses the HTTP 402 Payment Required status code to charge for a request: a server returns a 402, the client settles in USDC, and retries. A clear definition.