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Mercury x402 MCP

Pay-per-call MCP server (x402, USDC on Base) offering keyless web-read, structured extraction, and markdown tools with signed provenance receipts.

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Overview

Mercury is an MCP server that lets agents fetch, extract, and convert web content to markdown without an API key, paying per call over HTTP 402 in USDC on Base mainnet. Each result ships a cryptographically signed (EIP-191) provenance receipt an agent can verify offline, aimed at RAG and agent-to-agent commerce use cases that need proof of what was fetched and when; the server showed 98.3% 30-day uptime on Smithery at time of review.

Sato Score

34/100· Low

How open, active & verifiable — not a safety or returns grade.

Maintenance & liveness
20/35
Code transparency
0/20
Interface verifiability
8/10
Docs & demo
0/10
Listing transparency & provenance
4/15
Independent verification
2/10
View verification & embed badge →How the Sato Score works

Observed record — 49 daily checks since 2026-07-19

100%of our checks succeeded
Currently responding for 6 days
Succeeded
44
Failed
5
Their error
0
Unattributed
5

State changed on 2026-07-31 (responding → unclear), 2026-08-01 (unclear → responding), 2026-08-30 (responding → unclear), 2026-08-31 (unclear → responding).

This is the share of our daily checks that succeeded — not an availability guarantee. A check can fail because the host was down, because our runner timed out, or because the network in between dropped it, and only the first of those is a fact about this project. Failures are split by what we can attribute; anything we cannot attribute is counted, not hidden. 44 of these checks predate 2026-09-01, when the probe counted a bot-block (HTTP 403) as a failure and recorded no reason for any failure. Rates spanning that date mix two definitions. Since then: 100%.

Details

Chains
Base, Polygon, Avalanche, Sei
Agent types
MCP server (x402 payments)
Open source
Unknown
Pricing
Pay-per-call via x402 (USDC on Base), $0.003-$0.008/call
Last checked
2026-09-05

Marketplace Signals

No marketplace signals recorded for this resource yet.

Verification status reflects evidence reviewed by Sato Hub. Self-reported claims are never presented as verified.

#mcp#x402#web-scraping#provenance#usdc

Where Mercury x402 MCP fits

Payments

Related concepts: How Agents Use Wallets, What Are Onchain Agents?

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Listing History

Recorded changes to Mercury x402 MCP's listing — status, verification, Sato Score, and recent releases. Full history is kept in the listing record.

  1. Jul 19, 2026
    Status: Active → Early
  2. Jul 19, 2026
    Edited: category
  3. Jul 19, 2026
    Listed on Sato Hub
  4. Jul 19, 2026
    Sato Hub began tracking this listing

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Cite this page

Sato Hub. "Mercury x402 MCP — Sato Hub." Sato Hub, updated 2026-09-05, accessed 2026-09-05. https://satohub.ai/resources/mercury-x402-mcp

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