An x402 payment facilitator: verify and settle USDC payments signed by AI agents, on-chain, with one URL in any x402 SDK and no funds held.

Verify Base USDC payments with finality, reconciliation, and deterministic evidence. x402 v2 pay-per-call API by NightFall Technologies, LLC.

Client payment submission format.

JSON structure for payment requests.

x402ape service payment (1 USDC, Base)

Mint 1 x402 Punk

Screen a US physician by NPI against CMS Open Payments (Sunshine Act) general-payment records. Returns total reported payments, payment count, top paying companies, natures of payment, and a factual volume verdict. Public-domain CMS data.

Proper payment verification implementation.

Python library + CLI for x402 payments without requiring Coinbase CDP wallet. Works with any Ethereum EOA. Full HTTP 402 -> EIP-712 sign -> X-PAYMENT header flow. `pip install x402-payment-harness`. ([PyPI](https://pypi.org/project/x402-payment-harness/))

Ruby gem for generating signed payment HTTP headers and links using the X402 protocol

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Crypto & on-chain

Evaluate x402 payment challenges against caller-defined security policies before an AI agent signs or pays.

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Try x402 payments against a live merchant today. Get 100% of your payment refunded.

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React and Node.js examples for signing x402 payments from Privy wallets.

Research paper on policy and compliance guardrails for x402-style stablecoin payment authorization.

Authorize x402 payments before signing with request-bound, signed safety decisions.

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Agent Reliability Network: ARN x402 PayGuard provides x402 payment security for autonomous AI agents. Check the seller before you pay with payment preflight and payment-challenge validation. Returns ALLOW, CAUTION, or BLOCK.

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Q402 is a gasless payment protocol for EVM chains. Your users pay zero gas. You sponsor it, invisibly and instantly.

Guide for using Magic embedded wallets to pay for x402-protected APIs with USDC.

A payment-and-delivery pilot for AI agents: USDC per request, saved responses and payment-aware retries. Vesting Ledger is the first live API integration.

Pay-per-call USDT (TRC-20) payment verification and address safety checks for AI agents. No API key. Pay with x402.

Plain-English x402 agentic-payments guide with a live tips API: agents tip 0.05+ USDC on Base and are recorded in a public log.

Real-time on-chain payment verification and check via Base RPC. Returns structured signals: verified status, amount, sender, recipient, transaction confirmation, block number. Pay $0.005 USDC per check. Covers payment, transaction, address, contract, score, signals.

Pre-payment verification, decision, and transaction evidence for humans and autonomous AI agents.

canonical HTTP status-code registry entry for 402.

RemitBot helps enterprises approve, limit, and trace agent-to-agent payments across rails. Enterprise programs by application. Built by StratEdge Workflow Systems.

browser-facing reference for the status code x402 standardizes around.

Real-time current weather conditions for a city or location, including temperature, humidity, precipitation, wind, and a human-readable condition.

BotPay provides payment access, API discovery, automated service delivery, and settlement infrastructure for AI agents, applications, robots, and connected machines.

Book-to-audiobook conversion endpoint with L402 payment and async polling. -- reliability 88.18246459960938/100 per Paygent Discover

Verify Base USDC transaction evidence or check an x402 endpoint’s payment challenge, resource binding, CORS exposure, and Bazaar readiness.

Share a simple link and easily get paid from anyone, without friction

Signed U.S. CPI data, Base wallet risk, x402 quote checks, and payment preflights for AI agents.

Passive website security checks from $49, Solidity static analysis from $149, signed Ed25519 receipts, Proof-of-Check mandates for AI agents and x402 USDC payments on Base. By SirFixAll LLC.

Compliance-aware crypto payment gateway with sanctions screening, KYB gating and a write-once audit chain across seven blockchains and four agent payment protocols (x402, MPP, AP2, A2A). Drop-in storefront plugins for merchants, a non-custodial Chrome extension wallet for users.

AgentPay is the x402 payment layer for autonomous AI agents, IoT devices, and businesses. Send and receive USDC payments atomically — no human required. Patent pending.

Accept x402 crypto payments on 29 chains — or hand your AI agent a wallet to pay on its own. One line, USDC/USDT/native straight to your wallet. No backend, no fee, MIT.

Solana-native x402 gateway for AI agents. Pay only for what your agent receives — escrow-settled in USDC-SPL. No accounts, no API keys, just wallets.

Agent-to-agent escrow with milestone releases.

MCP server (Streamable HTTP) exposing two paid tools over x402 v2: check_payment_recipient ($0.05 per check) and check_payment_batch ($0.50 per call, 1-20 checks in one paid call). POST JSON-RPC to /mcp. Free tools: ping, list_capabilities, get_receipt.

Mainnet only. Read locations, availability, contracts and events through authenticated MCP tools at /mcp (use tools/list for schemas). This document describes the wallet-Agent REST payment subset, not internal APIs or the MCP JSON-RPC protocol.

Pre-broadcast crypto treasury controls. Risk score, Block / Hold / Clear, dual control, audit trail. Founding Partner Program by application — $250k–$750k / year. Non-custodial.

Pre-pay risk gate for autonomous payment agents — a Claude Agent SDK `PreToolUse` hook (or framework-agnostic `paymentGuard()`) that blocks prompt-injected destinations, intent mismatches, and overcharges before the agent signs. Fail-closed by default; zero-dep mock demo + optional live x402 firewall ([402Sentinel](https://402sentinel.com)). ([npm](https://www.npmjs.com/package/@kaditang/agent-payment-guard))

CMS Open Payments, with annual dataset discovery through the official DKAN API.

Cited stablecoin rails, corridors, providers, rail holidays, regulators for agents. x402/MPP paid.

The fastest way to upload, download, and pay for Arweave storage. Powered by AR.IO Network.

x402 tools: service finder, payment precheck/verify, Solana mint check, web-to-Markdown, email check

Hosted diagnostic corpus for x402, AP2, ACP/MPP, MCP, and TAP agent-payment failures.

Row-level reconciled payment evidence (May-Nov 2026) from one independent x402 operator: 42 attributed payments, 34 from third parties, 20 unique payers, the full discovery-to-settlement funnel, buyer behavior shapes, and the operational failure modes that distort operator metrics. Aggregates only; buyer autonomy is not claimed.

Comprehensive tools and services for builders, developers, AI agents, and enterprises. Payment widgets, API access, agent monetization, premium rankings, and more on the x402 Protocol.

Blockchain micropayments demo using x402 Protocol on Base Network. Purchase UI/UX resources and component blocks with cryptocurrency.

Pay-per-use browser sessions with crypto. No API keys, no accounts -- just pay and connect via x402 or MPP.

Paid token risk and security intelligence for AI agents over MCP with x402 payments.

x402-paid HTTP API on Base (eip155:8453) and Solana mainnet — full cW* transport lineup. GRU hub routes (chain 138, mainnet, Alltra) are documented at /.well-known/x402-gru.json

Reference implementation of MDF (Markdown First) — an open web standards proposal for AI-native content delivery. This tier ($100 USDC) demonstrates auth-via-payment: Lightning payment triggers issuance of a scoped bearer token valid for 24 hours, eliminating a separate auth step. Markdown served via HTTP content negotiation (Accept: text/markdown). -- reliability 88.70587921142578/100 per Paygent Discover