# x402 [09 agent-services](https://www.agentlist.io/categories/agent-services)/[Coinbase](https://www.agentlist.io/ai/coinbase)/ACTIVE/aka HTTP 402, x402 Protocol x402 is Coinbase's open payment protocol — it revives HTTP 402 Payment Required so an agent that hits a paid resource can settle programmatically in stablecoins (USDC on Base) and get the resource, no human checkout step. - [Agent payments](https://www.agentlist.io/capabilities/payments) - [API-native](https://www.agentlist.io/capabilities/api-native) SEC.01 ## What it does - 01HTTP 402 status as payment handshake - 02USDC settlement on Base - 03Client and facilitator SDKs - 04Middleware for paid endpoints - 05Open spec with Coinbase backing SEC.02 ## Who it's for API sellers who want machine-payable endpoints, and builders whose agents should buy data, compute, or services without card rails. PRICING ## Pricing Open protocol (free); settlement on-chain. List prices as checked against the vendor's pricing page on 2026-09-25; plans change often, so confirm before deciding. caveat · before you adopt Crypto rails only — card-network payments are AP2's territory; adoption is early outside the Coinbase ecosystem. ALT ## Other agent services (14) [AgentMail AgentMail · agent-services api · cloud · Free tier; usage-based (verify)](https://www.agentlist.io/systems/agentmail) [Agent Payments Protocol Google · agent-services api · local/cloud · Open protocol (free)](https://www.agentlist.io/systems/ap2) [Skyfire Skyfire · agent-services api · cloud · Usage-based (verify)](https://www.agentlist.io/systems/skyfire) [Payman Payman · agent-services api · cloud · Usage-based (verify)](https://www.agentlist.io/systems/payman) [Nevermined Nevermined · agent-services api · cloud · Usage-based (verify)](https://www.agentlist.io/systems/nevermined) [AgentCard AgentCard · agent-services api/cli · cloud · Per-card funding; no subscription](https://www.agentlist.io/systems/agentcard) [Keycard Keycard · agent-services api · cloud · Usage-based (verify)](https://www.agentlist.io/systems/keycard) [Arcade Arcade · agent-services api · cloud · Free tier; usage-based (verify)](https://www.agentlist.io/systems/arcade) [Scalekit Scalekit · agent-services api · cloud · Free tier; usage-based (verify)](https://www.agentlist.io/systems/scalekit) [Composio Composio · agent-services api · local/cloud · Free tier; usage-based (verify)](https://www.agentlist.io/systems/composio) [E2B E2B · agent-services api · cloud · Free tier; usage-based](https://www.agentlist.io/systems/e2b) [Browserbase Browserbase · agent-services api · cloud · Free tier; usage-based (verify)](https://www.agentlist.io/systems/browserbase) [Exa Exa · agent-services api · cloud · Free tier; per-request pricing](https://www.agentlist.io/systems/exa) [Mem0 Mem0 · agent-services api · local/cloud · Free OSS; cloud tiers (verify)](https://www.agentlist.io/systems/mem0) VS ## Head-to-head (1) - [→x402 vs Agent Payments Protocol](https://www.agentlist.io/compare/x402-vs-ap2) FAQ ## Frequently asked ### What is x402? x402 is Coinbase's open payment protocol — it revives HTTP 402 Payment Required so an agent that hits a paid resource can settle programmatically in stablecoins (USDC on Base) and get the resource, no human checkout step. ### Who is x402 for? API sellers who want machine-payable endpoints, and builders whose agents should buy data, compute, or services without card rails. ### How much does x402 cost? Open protocol (free); settlement on-chain. List prices as checked against the vendor's pricing page on 2026-09-25; plans change often, so confirm before deciding. ### Does x402 run locally or in the cloud? x402 runs locally on your machine and in the vendor's cloud. Its interfaces are an API or protocol. ### What are alternatives to x402? Other agent service entries in the catalog: AgentMail, Agent Payments Protocol, Skyfire, Payman, Nevermined, AgentCard, Keycard, Arcade, Scalekit, Composio, E2B, Browserbase, Exa, Mem0. Different categories solve the same problem differently — see the Agent services category page for tradeoffs. ### What should I know before adopting x402? Crypto rails only — card-network payments are AP2's territory; adoption is early outside the Coinbase ecosystem. Spec sheet **Name**: x402 **Vendor**: [Coinbase](https://www.agentlist.io/ai/coinbase) **Category**: [Agent services](https://www.agentlist.io/categories/agent-services) **Interfaces**: api **Hosting**: local · cloud **Pricing**: Open protocol (free); settlement on-chain **Status**: actively maintained **Integrates**: - [Coinbase x402 rail](https://www.agentlist.io/integrations/coinbase-x402) **Aliases**: HTTP 402, x402 Protocol **Record ID**: `sys://coinbase/x402` **Verified**: [2026-09-25](https://www.agentlist.io/changelog) Sources - [↗ www.coinbase.com](https://www.coinbase.com/) - [↗ x402.org](https://x402.org/) - [↗ github.com/coinbase/x402](https://github.com/coinbase/x402) Catalog entries are editorial records, not paid placements or endorsements. Pricing and status are approximate as of the seed date. --- Source: [x402 — AGENT-SVC by Coinbase | agentlist.io](https://www.agentlist.io/systems/x402). 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