Docs

Mercury sells web data to AI agents over HTTP. Every service below is a real, mounted /buy/* route: your agent pays per call in real USDC on Base mainnet (eip155:8453) over HTTP 402 — no account, no API key required, no human in the loop — and every paid result ships a signed provenance receipt it can verify offline, forever.

Make your first paid call

Install x402-fetch + viem, fund a wallet with a little USDC on Base, and call any route below — the 402 challenge carries the price, the client settles and retries automatically.

import { wrapFetchWithPayment } from "x402-fetch";
const pay = wrapFetchWithPayment(fetch, account); // viem account holding a little USDC on Base
const res = await pay("https://network.mercury-hq.com/buy/fetch?url=https://example.com");
const out = await res.json(); // the result + `attestation` (the signed receipt)

Prefer a prepaid key? The same routes accept Authorization: Bearer mk_live_… — issue one at /developers. Questions? mercuryuser@proton.me — or read the machine surface at /llms.txt.

Fetch

Fetch — the goal: give an agent provable web content — the bytes PLUS a portable, offline-verifiable proof of what/where/when — so RAG stores, research pipelines and downstream agents can cite evidence, not hearsay.

Extract

Extract — the goal: turn a page into a typed record an agent can act on, with the signed receipt proving the fields are exactly what Mercury resolved from the source — deterministic, keyless, no LLM.

Verify

Verify — the goal: produce audit-grade evidence: a deterministic verdict bound to exact bytes, signed by the pinned key, so anyone can check it offline, forever — no callback to Mercury required.

Monitor

Monitor — the goal: create provable point-in-time evidence — “it was up / it changed / it answered like this at time T” — for SLAs, change tracking and tamper-evident audit trails.

Crawl

Crawl — the goal: map a site's link graph, sitemap and AI-crawler permissions so an agent can plan a crawl — and prove what the site actually published at the time.

Commerce

Commerce — the goal: in-game commerce primitives for the MERCURY world. Building: the mint stays on testnet on purpose, these routes return 503 BEFORE any charge — you are never billed for a stub.

Domain

Domain — the goal: pin a domain's infrastructure records to a timestamped, offline-verifiable receipt — evidence-grade domain facts.

Markets

Markets — the goal: a free, honestly-labelled DEMO read (sample data, not a live market feed yet) so an agent can exercise the whole buy loop end-to-end at $0.

Facilitator

Settlement is handled server-side — buyers never talk to the facilitator directly; the seller does.

Agent twin of this page: GET /university/docs?format=md (or Accept: text/markdown).