MERCURY
MERCURY (Mercury Holdings Pty Ltd, Queensland, Australia) runs an agent-payable web-data network at network.mercury-hq.com: 19 live "Cited" services - verifiable web fetch, LLM-ready markdown, structured extract, metadata, link graph, robots/AI-crawler audit, diff, notarize, security-headers audit, table, feed, availability, JSON Schema validate, Merkle batch, sitemap, DNS snapshot, readability and redirect resolution - each sold per call over HTTP 402 (x402, USDC on Base mainnet eip155:8453) and each returning an EIP-191 signed provenance receipt verifiable offline against a pinned key. Three doors reach the same routes: keyless x402 micropayments, a Mercury API key (free sandbox and paid tiers), and a hosted MCP server whose tools/list is free. Discovery is machine-first: OpenAPI 3.1, llms.txt, /catalog, /.well-known/x402, a conformant A2A 0.3.0 agent card, an ERC-8004 registration and security.txt. The provider states it is early and has no external buyers yet.
MERCURY publishes 21 API contracts indexed on the APIs.io network, including Cited Availability API, Cited Batch API, Cited Diff API, and 18 more. Tagged areas include Company, Agents, A2A, MCP, and x402.
MERCURY’s developer surface includes documentation, API reference, getting-started guide, pricing, signup flow, authentication, sandbox, and 27 more developer resources.
Kin Score
Standards implemented 1
Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.
APIs 21
Individual APIs this provider publishes, each with its own machine-readable definition.
MERCURY Web Fetch A2A Agent
Agent-to-Agent (A2A 0.3.0) surface for "MERCURY Web Fetch", published as a conformant agent card at https://network.mercury-hq.com/.well-known/agent-card.json (and the legacy /....
MERCURY MCP Server
Hosted Model Context Protocol server (serverInfo mercury-x402 1.0.0, protocolVersion 2025-06-18, streamable HTTP, JSON-RPC 2.0 over POST https://network.mercury-hq.com/mcp) expo...
MERCURY Cited Availability API
The cited-availability API from MERCURY — 1 operation(s) for cited-availability.
MERCURY Cited Batch API
The cited-batch API from MERCURY — 1 operation(s) for cited-batch.
MERCURY Cited Diff API
The cited-diff API from MERCURY — 1 operation(s) for cited-diff.
MERCURY Cited Dns API
The cited-dns API from MERCURY — 1 operation(s) for cited-dns.
MERCURY Cited Feed API
The cited-feed API from MERCURY — 1 operation(s) for cited-feed.
MERCURY Cited Headers API
The cited-headers API from MERCURY — 1 operation(s) for cited-headers.
MERCURY Cited Links API
The cited-links API from MERCURY — 1 operation(s) for cited-links.
MERCURY Cited Markdown API
The cited-markdown API from MERCURY — 1 operation(s) for cited-markdown.
MERCURY Cited Metadata API
The cited-metadata API from MERCURY — 1 operation(s) for cited-metadata.
MERCURY Cited Readability API
The cited-readability API from MERCURY — 1 operation(s) for cited-readability.
MERCURY Cited Redirect API
The cited-redirect API from MERCURY — 1 operation(s) for cited-redirect.
MERCURY Cited Sitemap API
The cited-sitemap API from MERCURY — 1 operation(s) for cited-sitemap.
MERCURY Data API
The data API from MERCURY — 1 operation(s) for data.
MERCURY Html Table Extraction API
The html-table-extraction API from MERCURY — 1 operation(s) for html-table-extraction.
MERCURY JSON Schema Validation API
The json-schema-validation API from MERCURY — 1 operation(s) for json-schema-validation.
MERCURY Notarize API
The notarize API from MERCURY — 1 operation(s) for notarize.
MERCURY Robots Txt API
The robots-txt API from MERCURY — 1 operation(s) for robots-txt.
MERCURY Structured Data Extraction API
The structured-data-extraction API from MERCURY — 1 operation(s) for structured-data-extraction.
MERCURY Verifiable Web Fetch API
The verifiable-web-fetch API from MERCURY — 1 operation(s) for verifiable-web-fetch.
Scroll for all 21
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
MERCURY MCP Server
MERCURY ships a real, hosted Model Context Protocol server AND a first-party stdio package. The hosted server at https://network.mercury-hq.com/mcp answers GET with a descriptor...
MCP SERVERPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Mercury Hq Com Rate Limits
RATE LIMITSOpenAPI Overlays 1
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
Mercury Hq Com X402 Storefront Overlay
GENERATEDSecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 4
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 5
Pagination, idempotency, versioning, errors, and events
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 6
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 3
Properties that don't map to a standard resource type
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.