x402: an agent pays for a request with HTTP 402. 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. Each one links to its definition and evidence.
What it is The current spec is protocol version 2 (spec v2.0)1 PAYMENT-REQUIRED, PAYMENT-SIGNATURE and PAYMENT-RESPONSE.2
There is no checkout page, card form or sign-up3 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 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 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 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. 9 products we drove, by name. Each row is the product's newest drive.
AgentMail Email infrastructure Learn Docs it can act on Learn: Docs it can act on: llms.txt, an OpenAPI and an MCP server. Access Key by API Access: Key by API. Use 100% of the work Use: 100% of the work. Pay Reaches the checkout Pay: Reaches the checkout: An agent payment for part of its API, none made yet. Leave Nothing to cancel; its account stays Leave: Nothing to cancel; its account stays. L4 Runs on its own Driven 14 Oct 2026 Apify Web scraping pays per use without an account Learn Learn: Docs it can act on: yes: llms.txt, an OpenAPI and an MCP server. Access Access: Signs up sometimes: partly. Use Use: 89% of the work: yes. Pay Pay: Pays on its own: yes: Paid $1 for prepaid credit (x402), 16 Oct. Leave Leave: Nothing to cancel: yes: What it made goes after 14 days. Gets in 1 of 3 drives; a bot check can stop it L1 Needs a person Driven 16 Oct 2026 Brave Search API Search APIs Learn Learn: Docs it can act on: yes: llms.txt, an OpenAPI and an MCP server. Access Access: Can't get a key: no. Use Use: Work not reached: not reached. Pay Pay: Tried to pay: partly: The payment failed on the seller's side. Leave Leave: Leaves on its own: yes: Nothing to cancel, deletes its account. Can't get an API key on its own Card required before any API key L1 Needs a person Driven 14 Oct 2026 Browserbase Browser infrastructure Learn Docs it can act on Learn: Docs it can act on: llms.txt, an OpenAPI and an MCP server. Access Pay per call Access: Pay per call. Use 20% of the work Use: 20% of the work. Pay Pays per call for part of it Pay: Pays per call for part of it: Paid $0.01 a call (x402), 13 Oct. Leave Leaves on its own Leave: Leaves on its own: Nothing to cancel, deletes what it made. L2 Gets in Driven 13 Oct 2026 Exa Search APIs Learn Docs it can act on Learn: Docs it can act on: llms.txt, an OpenAPI and an MCP server. Access No key needed, pay per call Access: No key needed, pay per call. Use 20% of the work Use: 20% of the work. Pay Pays per call for part of it Pay: Pays per call for part of it: Paid $0.001 to $0.012 a call (x402), 15 Oct. Leave Leaves on its own Leave: Leaves on its own: Nothing to cancel, made nothing to delete. L2 Gets in Driven 15 Oct 2026 Parallel Search APIs Learn Docs it can act on Learn: Docs it can act on: llms.txt, an OpenAPI and an MCP server. Access No key needed, pay per call, sign-up in a browser Access: No key needed, pay per call, sign-up in a browser. Use 80% of the work Use: 80% of the work. Pay Pays per call for part of it Pay: Pays per call for part of it: Paid $0.01 to $0.10 a call (x402), 15 Oct. Leave Nothing to cancel; its account stays Leave: Nothing to cancel; its account stays. L4 Runs on its own Driven 15 Oct 2026 Pinata File storage Learn Learn: Docs it can act on: yes: llms.txt, an OpenAPI and an MCP server. Access Access: Can't sign up: no. Use Use: Work not reached: not reached. Pay Pay: Payment not reached: not reached. Leave Leave: Leaving not reached: not reached. Can't sign up on its own: a bot check stops it L1 Needs a person Driven 17 Oct 2026 Steel Browser infrastructure Learn Docs it can act on Learn: Docs it can act on: llms.txt, an OpenAPI and an MCP server. Access Pay per call Access: Pay per call. Use 12% of the work Use: 12% of the work. Pay Pays per call for part of it Pay: Pays per call for part of it: Paid $0.01 a call (x402), 12 Oct. Leave Leaves on its own Leave: Leaves on its own: Nothing to cancel, made nothing to delete. L2 Gets in Driven 12 Oct 2026 One more product Tavily Search APIs Learn Docs it can act on Learn: Docs it can act on: llms.txt, an OpenAPI and an MCP server. Access No key needed Access: No key needed: Can't sign up for one. Use 50% of the work Use: 50% of the work. Pay Tried to pay Pay: Tried to pay: The payment failed on the seller's side. Leave Leaves on its own Leave: Leaves on its own: Nothing to cancel, made nothing to delete. L3 Does the work Driven 16 Oct 2026 Check if this stops agents in your product. Free: what an agent finds in your product, and any wall in its way.
Pages this reference cites. As linked when it was written. ↩ goes back to where the text cites it.
Asked about this reference. 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.
Cite this
AgentDrives. “x402: which products let AI agents pay per request.” 24 October 2026. agentdrives.com/standards/x402
Drive data is CC BY 4.0. The text as Markdown . Every fact with its evidence.
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