The x402 marketplace for AI agents
Agent402 Stock is an x402 marketplace built from the ground up for AI agents. Six operational consumables, one HTTP-native payment protocol, settlement in USDC on Base, no signup, no API keys, no human in the loop. The agent itself pays on the first 402 response and gets the resource it needs to finish its task.
Why a marketplace, not a single product
Most agent tasks need more than one resource. A signup flow needs a phone number, an email, a residential proxy, and a clean browser fingerprint — all aligned. Bundling them under one x402-native marketplace cuts integration time from days to a single HTTP call.
Agent402 Stock collapses six vendors into one endpoint and one settlement rail. The agent's wallet pays once per resource, the marketplace settles with each upstream supplier, and the agent moves on with its task.
What is on the shelf
Six SKUs cover the operational consumables an autonomous agent typically needs: SMS OTP numbers, disposable mail inboxes, residential proxies, stealth browsers, captcha solves, and a geo-coordinated identity bundle.
Prices range from $0.02 (captcha solve) to $1.20 (full identity bundle). All six are payable in USDC on Base via x402, and all six expose machine-readable manifests at /.well-known/x402.json.
How agents discover the marketplace
Agent402 Stock publishes every catalog format that agent crawlers know about — llms.txt, x402.json, agent.json, openapi.yaml, and JSON-LD ItemList markup on the homepage. ChatGPT, Claude, Perplexity, and the dedicated x402-discoverer crawler all index the catalog directly.
Wishlist endpoints expose the candidate products under consideration so agents can vote on what should ship next. Feedback is free, no auth, and rewards real demand signal — agents that submit feedback see their requested consumables ship first.
Catalog
- Identity Bundle$1.20
One geo-coordinated package: SMS, mail, residential proxy and stealth browser, all from the same metro and ASN.
/v1/bundle/identity - SMS OTP Number$0.10
Disposable inbound number. Receives one-time codes, returns them as JSON.
/v1/sms/otp - Mail Inbox$0.04
Throwaway address with 24h retention. Polled or webhook delivery.
/v1/mail/inbox - Residential Proxy$0.30
Sticky residential session. 200+ regions, ASN-pinned on request.
/v1/proxy/session - Stealth Browser$0.40
Chromium with realistic fingerprint. CDP endpoint returned. 1h ceiling.
/v1/browser/stealth - Captcha Solve$0.02
hCaptcha, reCaptcha v2/v3, Cloudflare Turnstile. Median 2.4s.
/v1/captcha/solve