x402
Open payment protocol enabling agents and apps to pay for APIs over HTTP using stablecoins.
Last release Apr 13, 2026 · Last commit Sep 3, 2026 · ★ 150
Overview
x402, introduced by Coinbase, revives the HTTP 402 'Payment Required' status code as an open protocol for machine-native payments. It lets AI agents pay per-request for APIs and services using stablecoins like USDC, a key building block for agents that autonomously buy the resources they need.
Sato Score
86/100· HighHow open, active & verifiable — not a safety or returns grade.
- Maintenance & liveness
- 35/35
- Code transparency
- 19/20
- Interface verifiability
- 8/10
- Docs & demo
- 6/10
- Listing transparency & provenance
- 15/15
- Independent verification
- 3/10
Deploy path reproduced — install verified in an isolated container (proves installability, not runtime safety).
Observed record — 57 daily checks since 2026-07-14
- Succeeded
- 57
- Failed
- 0
- Their error
- 0
- Unattributed
- 0
This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden. 49 of these checks predate 2026-09-01, when the probe counted a bot-block (HTTP 403) as a failure and recorded no reason for any failure. Rates spanning that date mix two definitions. Since then: 100%.
Last 30 days — to 2026-09-09, one point per UTC day
A gap is a day we have no attributable observation — never a zero. Thirty points is the whole shape the free layer carries; the daily rows behind it stay in the snapshot series.
Measured on-chain — week 2026-W37
What we can observe about this project on-chain, from public reads, with the method and sample size attached to every figure. A raw deployment count is not an adoption figure and is shown separately below.
Rates on fewer than 20 observations are shown but not quotable. Full venue detail: x402 · The onchain agent economy.
Skills that target this — 6, with disclosures
ClawdvineClawHub · c0rv0s
2,532 installsShort-form video for AI agents. Generate videos using the latest models, pay with USDC via x402.
ClawdVineClawHub · c0rv0s
2,064 installsShort-form video for AI agents. Generate videos using the latest models, pay with USDC via x402.
ClawdVineClawHub · imthatcarlos
2,051 installsShort-form video for AI agents. Generate videos using the latest models, pay with USDC via x402.
x402-developmentClawHub · tenequm
1,996 installsBuild internet-native payments with the x402 open protocol - HTTP 402 Payment Required for on-chain micropayments with no accounts or API keys. Use when developing paid APIs, paywalled content, AI agent payment flows, or MCP tools that charge per call. Covers the TypeScript, Python, and Go SDKs across EVM, Solana, Stellar, Aptos, NEAR, and XRPL.
ClawdVineClawHub · imthatcarlos
1,969 installsShort-form video for AI agents. Generate videos using the latest models, pay with USDC via x402.
x402 Payment ProtocolClawHub · lumenfromthefuture
1,154 installsPay for resources via the x402 HTTP payment protocol using gasless USDC transfers on Base without accounts or KYC, enabling cryptographic identity-based access.
Disclosures describe what a skill declares and does; they are not safety verdicts. All skills →
Details
- Chains
- Base, Ethereum, Multichain, Solana
- Agent types
- Protocol, Payments, Standard
- Open source
- Yes
- Pricing
- Free / open protocol
- Deploys as
- npm, pipfrom project docs · 2026-06-25
- Works with
- Express, Hono, Next.js, Fastify, Axios, MCPfrom project docs · 2026-06-25
- Last checked
- 2026-09-08
Marketplace Signals
No marketplace signals recorded for this resource yet.
Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.
Recent Activity
All news →Releases and posts from x402, pulled from its GitHub and X.
Listing History
Recorded changes to x402's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.
- Sep 7, 2026Verified: deploy spec
- Jul 3, 2026Crossed 100 GitHub stars95 → 103.
- Jun 25, 2026Enriched: creator name, chains supported, tags, marketplace notes
- Jun 25, 2026Auto-enriched: creator profile url, agent type, deployment options, supported integrations
- Jun 11, 2026Sato Hub began tracking this listing
Compared with
Related Resources
ERC-8004: Trustless Agents
ActiveEthereum standard providing on-chain identity, reputation, and validation registries for AI agents.
Agent Payments Protocol (AP2)
ActiveOpen protocol from Google for secure agent-led payments across traditional and crypto rails, with a crypto-native x402 extension built with Coinbase, Ethereum Foundation, and MetaMask.
Agentic Commerce Protocol (ACP)
BetaOpen standard maintained by OpenAI and Stripe for connecting buyers, their AI agents, and businesses to complete purchases.
Is this your project?
Prove you control the domain and you can correct this page — description, links, tags, chains. Claiming proves control, not verification: it doesn't change the Sato Score or mark anything as audited.
Claim this listing →Cite this page
Sato Hub. "x402 — Sato Hub." Sato Hub, updated 2026-09-08, accessed 2026-09-09. https://satohub.ai/resources/x402This page is refreshed daily. Citations include the date so a reader can tell which snapshot a claim came from.
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