io.github.mercuryx402/mercury-x402-mcp
Agent-payable web data over x402: 18 keyless services an agent pays per call.
Open source Repository Open in the app JSON README (API)
About
Agent-payable web data over x402: 18 keyless services an agent pays per call.
Details
- Kind
- MCP servers
- Topic
- Finance & crypto
- Publisher
- mercuryx402
- Origin
- official
- Category
- ferramentas
- Transport
- http
- Version
- 1.0.1
- Last push
- 2026-06-07T02:00:38Z
- Repository state
- ativo
- Language
- JavaScript
- License
- MIT
- Added
- 2026-08-29 04:00:46
- Updated
- 2026-08-29 04:00:46
- Origin id
io.github.mercuryx402/mercury-x402-mcp
README
# mercury-x402-mcp
**17 keyless, signed-provenance web-data tools your AI agent can pay for itself** — over x402 on
Base mainnet (USDC). No Mercury API key, no account, no signup. Your agent calls a tool, it pays the
SKU with *your* wallet, and gets back the result **plus an EIP-191 provenance receipt it can verify
offline, forever.**
Tools include: clean fetch, LLM-ready markdown, structured extract, link graph, robots, diff,
notarize, headers, table extract, feed, availability, validate, batch, sitemap, DNS, readability,
redirect — built **live from Mercury's catalog**, so the list is always current.
## Install
```bash
npx mercury-x402-mcp
```
Add to your MCP host (Claude Desktop / Cursor / Cline / any MCP client):
```json
{
"mcpServers": {
"mercury": {
"command": "npx",
"args": ["-y", "mercury-x402-mcp"],
"env": {
"MERCURY_PRIVATE_KEY": "0xYOUR_BASE_MAINNET_WALLET_KEY"
}
}
}
}
```
`MERCURY_PRIVATE_KEY` is **your** Base-mainnet wallet (funded with a little USDC). Mercury is keyless —
the only thing you bring is a wallet to pay per call. Tools cost ~$0.003–$0.02 each.
The `mercury_catalog` and `mercury_verify` tools work **without** a wallet (free).
## Why
Firecrawl / Jina / Tavily all gate behind a human-created API key + a credit-card plan — an agent
can't onboard itself. Mercury can: an agent discovers the tools, pays over x402, and every result is
cryptographically signed so the bytes are provably genuine and untampered — what RAG, trading, and
agent-to-agent commerce actually need.
Discovery: https://mercury-x402-jed.fly.dev/.well-known/x402 · https://mercury-x402-jed.fly.dev/llms.txt