x402 resource directory

Find paid HTTP operations and MCP tools by URL, host, method or tool name. Compare payment terms across networks and catalogs.

Distinct HTTP URLs
162,666
Distinct MCP URLs
43
Catalog observations
263,972
URLs with a 402 in 7 days
1,494
Network identifiers
181

These results as JSON · Clear filters

GET https://vellum.totemworks.workers.dev/api/trials/feasibility · 1 observation
Finished feasibility brief for one query, counted across the full ClinicalTrials.gov result set.

Vellum profile

  • Base · exact
    $5.0000 (USDC)
    Recipient 0x428f6223e269621aE6B0B3Ad8e1e608c2E494C95
    PayAI · seen
GET https://vellum.totemworks.workers.dev/api/trials/search · 1 observation
Search ClinicalTrials.gov and return a short study list.

Vellum profile

  • Base · exact
    $0.0150 (USDC)
    Recipient 0x428f6223e269621aE6B0B3Ad8e1e608c2E494C95
    PayAI · seen

Counts describe directory coverage, including testnets. Each resource groups the same URL, HTTP method or MCP tool across sources. A catalog sighting records published terms. A live 402 records the endpoint’s reply to an unpaid request.