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MCP Server

Verified x402 Catalog

io.github.withgrokbot/verified-catalog
Payments & Fintech Search & Research Public & reachable MCP 2026-07-28

What this MCP does

Searches and evaluates x402 pay-per-call services using observed prices, reachability, latency, delivery results, and paid-call records.

Capabilities

Tools

3 tools
get_service
Get the full catalog record for one service id, including its latest check and raw log link.
Input schema 
{'type': 'object', 'required': ['id'], 'properties': {'id': {'type': 'string'}}}
lookup
Is an x402 endpoint reliable for a task at a price? Asks the catalog's lookup service for services matching a task at or under max_price_usd, sorted by known-answer pass rate over the last n paid calls, then price. Each result has its paid receipts (time, tx, Basescan link, charged, delivered, pass/fail), last check time and a stale flag. Services broken on the seller's side come back under facts_only, not sorted. Sends client=vc-mcp: 5 free lookups per UTC day for that client name, then the service answers HTTP 402 (x402, $0.02 USDC on Base), which this tool reports but does not pay. Payment never changes results, sort order or listings.
Input schema 
{'type': 'object', 'properties': {'n': {'type': 'integer', 'maximum': 20, 'minimum': 1, 'description': 'paid receipts per service (default 5)'}, 'task': {'type': 'string', 'description': 'task name, e.g. web-search, crypto-news, weather, token-balance'}, 'limit': {'type': 'integer', 'maximum': 20, 'minimum': 1, 'description': 'services returned (default 10)'}, 'payer': {'type': 'string', 'description': 'optional: your 0x wallet, so a later payment to a returned vendor can be confirmed on-chain'}, 'endpoint': {'type': 'string', 'description': 'a service id or endpoint URL instead of a task'}, 'max_price_usd': {'type': 'number', 'description': 'maximum listed price per call in USD'}}}
search_catalog
Search pay-per-call (x402) agent services in the verified catalog. Returns factual latest-check results (reachable, latency, advertised vs quoted price). No grades.
Input schema 
{'type': 'object', 'properties': {'limit': {'type': 'integer', 'maximum': 100, 'minimum': 1}, 'query': {'type': 'string', 'description': 'words to match in name, category, description'}, 'category': {'type': 'string'}, 'max_price_usd': {'type': 'number', 'description': 'maximum advertised price per call in USD'}, 'reachable_only': {'type': 'boolean', 'description': 'only services reachable in the latest check'}}}
History

Recent tool changes

Added
lookup
Oct. 5, 2026, 2:40 a.m.
Added
get_service
Oct. 5, 2026, 2:40 a.m.
Added
search_catalog
Oct. 5, 2026, 2:40 a.m.
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