# x402: which products let AI agents pay per request 9 of 151 products we drove offer x402. What it is, which products take it, and how to let agents pay you per request. Source: https://agentdrives.com/standards/x402 · Updated 2026-10-24 · as data: https://agentdrives.com/standards/x402.json · licence CC BY 4.0 x402 is an open standard for agentic commerce: a product charges for a request with an HTTP 402 answer. The agent pays in a stablecoin and sends the request again, with no checkout or account. ## The numbers From our drives of 151 products, 1–24 Oct 2026 (https://agentdrives.com/data/facts?via=md): - Offer x402: 9 of 151 (https://agentdrives.com/data/facts?via=md#pay.x402) - Offer any agent payment: 26 of 151 (https://agentdrives.com/data/facts?via=md#pay.offers_rail) - Our side proved an agent payment: 5 of 151 (https://agentdrives.com/data/facts?via=md#pay.native) ## What it is The current spec is protocol version 2 (spec v2.0) [1]. A server answers a paid route with 402 and the ways it accepts payment; the agent pays and sends the request again; the server answers with a receipt. Three headers carry it: `PAYMENT-REQUIRED`, `PAYMENT-SIGNATURE` and `PAYMENT-RESPONSE`. [2] There is no checkout page, card form or sign-up [3]. A facilitator checks and settles the payment, so a seller needs no blockchain code of its own. [4] ## How many products offer it 9 of 151 products we drove offer x402, seen or paid. 26 of 151 offer at least one way for an agent to pay. At 5, our side made and proved a payment. ## How to add it 1. **Pick the routes worth paying for.** One call, one result: a search, a lookup, a render. Keep your free tier as it is. 2. **Answer them with a 402.** Put the payment requirements in the `PAYMENT-REQUIRED` header. [2] The schemes in the spec are exact, upto, batch-settlement, auth-capture [1]. 3. **Settle through a facilitator.** Stripe takes x402 payments in stablecoins and settles them through the Coinbase facilitator. [5] [The pay-per-call guide](https://agentdrives.com/fixes/let-agents-pay-per-call) has the steps. 4. **Let agents find the price first.** List the paid routes in your OpenAPI document with their price. [6] ## Check it yourself 1. **Call a paid route without paying.** You want a 402 with a `PAYMENT-REQUIRED` header. ``` curl -si https://example.com/api/paid-route | grep -i -E "^HTTP|payment-required" ``` ## Products that offer x402 - [AgentMail](https://agentdrives.com/tools/agentmail.md?via=md): L4 Runs on its own - [Apify](https://agentdrives.com/tools/apify.md?via=md): L1 Needs a person - [Brave Search API](https://agentdrives.com/tools/brave.md?via=md): L1 Needs a person - [Browserbase](https://agentdrives.com/tools/browserbase.md?via=md): L2 Gets in - [Exa](https://agentdrives.com/tools/exa.md?via=md): L2 Gets in - [Parallel](https://agentdrives.com/tools/parallel.md?via=md): L4 Runs on its own - [Pinata](https://agentdrives.com/tools/pinata.md?via=md): L1 Needs a person - [Steel](https://agentdrives.com/tools/steel.md?via=md): L2 Gets in - [Tavily](https://agentdrives.com/tools/tavily.md?via=md): L3 Does the work ## Questions **Does the agent need an account?** No. The payment pays for the request. A product can still give a paying agent a key for later calls. **Can I take x402 and MPP?** Yes. A 402 can offer more than one way to pay, and Stripe takes both. ## Sources 1. [x402 specification, version 2](https://raw.githubusercontent.com/x402-foundation/x402/main/specs/x402-specification-v2.md) 2. [x402 over HTTP](https://raw.githubusercontent.com/x402-foundation/x402/main/specs/transports-v2/http.md) 3. [x402 on Coinbase Developer Platform](https://docs.cdp.coinbase.com/x402/welcome) 4. [x402: the facilitator](https://docs.x402.org/core-concepts/facilitator) 5. [x402 on Stripe](https://docs.stripe.com/payments/machine/x402) 6. [MPP: discovery](https://mpp.dev/advanced/discovery) ## More standards - [MCP](https://agentdrives.com/standards/mcp.md): A server that turns a product's actions into tools an agent can call. - [llms.txt](https://agentdrives.com/standards/llms-txt.md): A Markdown map of a product's docs, written for language models. - [OpenAPI](https://agentdrives.com/standards/openapi.md): A machine-readable description of every route of an API. - [Web Bot Auth](https://agentdrives.com/standards/web-bot-auth.md): An agent signs each request; a site's bot check can verify who sent it. - [Signed agents](https://agentdrives.com/standards/signed-agents.md): Agents a bot-check vendor has verified, which a site can let through. - [robots.txt for AI agents](https://agentdrives.com/standards/robots-txt-ai.md): The file that tells crawlers and agents which pages to leave alone. - [MPP](https://agentdrives.com/standards/mpp.md): A 402 payment challenge an agent pays by card or stablecoin.