Ship your API to AI agents in 30 seconds.

Agents are calling APIs faster than humans can sign up for them.

Every API on the market today assumes a human will register, file a credit card, and babysit a key. Agents don't do that. They call, they consume, they invoke the next tool. The friction that was acceptable in 2015 — sign up, validate email, generate API key, store secret, rotate every 90 days — is the friction that breaks every autonomous workflow we've watched in the last 12 months.

Until today, our 100+ first-party endpoints answered that for the buy-side. You could call /v1/pdf-md with a wallet signature and get markdown back in 1.2 seconds. Good for buyers. Bad for builders. If you had your own API, you couldn't list it on tools402 without us hand-curating it.

With Sprint 15 that ends. Anyone with a Base wallet can publish. Sign an EIP-712 message, drop your upstream URL, set a price in atomic USDC. Three regional probes verify your endpoint is alive. Your slug lands in /v1/_meta within seconds. From that moment, any agent calling any tools402 endpoint can find yours and pay you for it.

Stripe took the friction out of accepting credit cards.
tools402 takes the friction out of accepting agents. Wallet-only sign-up. No KYC. No platform fee. No payout fee. 3 % on paywall, 4 % on proxy — that's the only money we make on sell-side.

Three steps. No human review.

The full publication flow fits on a coffee break. No form, no email, no support ticket. Sign one EIP-712 message; the rest is HTTP.

That's the loop. From the agent's side, your endpoint shows up in /v1/_meta with a seller field set to your wallet address, distinguishable from our first-party catalog. Buyers call it the same way they call any other route. You receive USDC daily without lifting a finger.

3 % paywall. 4 % proxy. Nothing else.

Paywall mode (3 %) — tools402 issues an Ed25519-signed JWT (60-second TTL) to the buyer. The buyer hits your URL with the JWT in the header. You verify it with @tools402/client.verifyPaywallJWT(). Lowest take rate; you handle hosting + bandwidth.

Proxy mode (4 %) — tools402 relays the request through our infra (50 MB body limit, 30 s timeout). Higher take rate but zero infra setup. Useful for static or cheap endpoints, or unknown traffic profiles.

The 3 % paywall rate is structural, not promotional. We chose it before launch and we cap it there to keep the marketplace lean and predictable for sellers. The cap is a feature, not a constraint.

Never goes silent.

The single biggest risk for any x402 marketplace is the facilitator going down. In January 2026 the Coinbase CDP facilitator was silent for 25 consecutive days. Marketplaces that depended on a single rail went dark with it. We didn't.

When Coinbase facilitators went silent for 25 days, we didn't. Multiple x402 facilitators run in parallel on the chains we accept buyer payment on (Base, Polygon today; Solana shipping this wave), weighted by measured latency. Sub-500 ms automatic failover.

The router cycles through Coinbase CDP and PayAI in order of p95 latency. A local-key signer covers chain outages. Battle-tested in production — 105 tests, 100 % coverage.

Google's AP2 ecosystem, three touchpoints live.

Google announced AP2 (Agent Payments Protocol) on 16 September 2025 with 60 partners — Visa, Mastercard, Adyen, Stripe, Coinbase, and 54 issuers and acquirers. AP2 standardises cryptographically-signed Intent Mandates so an agent can prove what it was authorised to spend, where, and when.

tools402 bridges x402 wire payments to AP2 mandates. Three of the four touchpoints are LIVE today, shipped alongside the sell-side launch:

Full reference and curl examples on /docs/ap2. The fourth touchpoint (E1, IntentMandate as primary authorisation with deferred settlement) ships in v1.1 post-Sprint 16.