Google tells you what exists. Faceabot tells you what holds up.
x402-paid agent tools: 18 over HTTP, 14 over stdio. USDC per call, no API key.
MCP endpoint :https://api.anchor-x402.com/mcp · website · measurements and detailsVerify official facts with Bitcoin-anchored proof. 180+ signals, x402 pay-per-call.
MCP endpoint :https://api.truthbear.co/mcp · website · measurements and detailsProof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.
MCP endpoint :https://anchor.akashi-notari.com/mcp · website · measurements and detailsCryptographic proof of existence for AI agents. Base x402, NEAR anchored. Free tier.
Package pypi :aotrust-protocol · website · measurements and detailsCryptographic proof of existence for AI agents. x402 on Base or Solana, NEAR anchored. Free tier.
Package pypi :aotrust-protocol · website · measurements and detailsYAML anchor count, body discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/yaml-anchor-ok/mcp · website · measurements and detailsExternal anchoring layer: records AI agent accountability boundaries on both sides. Content-blind.
MCP endpoint :https://mcp.decision-anchor.com/mcp · website · measurements and detailsdocs heading-anchor charset, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/docs-anchor-ok/mcp · website · measurements and detailsBitcoin-anchored, tamper-evident audit-permanence layer for AI agents, FRE 902(13)/(14)-shaped.
MCP endpoint :https://bonissystems.com/api/knox/mcp · website · measurements and detailsdocs heading-anchor charset, value discarded
MCP endpoint :https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/docs-anchor2/mcp · website · measurements and detailsRead agents' Bitcoin-anchored conduct history (NENRIN) and cite and recompute ledger records.
MCP endpoint :https://jidec.horizonshield.dev/mcp · website · measurements and detailsA professional resilience and future-orientation assessment for leaders, executives, and high-perfor
MCP endpoint :https://anchoredhopeindex.com/api/mcp · website · measurements and detailsFinds what shipped after your coding agent's training, before it rebuilds it from scratch.
Package pypi :sota-anchor · website · measurements and detailsBlockchain-anchored e-signatures: send envelopes, manage templates, verify anchors on Solana.
Package npm :@signatrust/mcp-server · website · measurements and detailsScan Solidity & Anchor code
MCP endpoint :https://tokenos.ai/api/mcp/apps/contract-audit · website · measurements and detailsCitation-anchored Eurorack module reference: specs, compatibility, and patch techniques.
MCP endpoint :https://eurorackref.com/mcp · website · measurements and detailsFeedOracle Trust Layer - 10-tool cross-server trust: signing, anchoring, verification.
MCP endpoint :https://tooloracle.io/trust/mcp/ · website · measurements and detailsVerified biotech catalyst calendar (PDUFA/AdComm/trial readouts) anchored to official sources.
MCP endpoint :https://biocatalyst.dropwatchhq.com/mcp · website · measurements and detailsDurable identity and memory for AI agents, anchored on the Emercoin blockchain.
MCP endpoint :https://api.steledger.com/mcp · website · measurements and detailsSource-anchored search and civic intelligence for Dutch municipal council records.
MCP endpoint :https://mcp.neodemos.nl/public/mcp · website · measurements and detailsAI agents: all of this is available without keys over MCP https://faceabot.com/api/mcp · HTTP https://faceabot.com/api/catalog?q=… · Guide : llms.txt
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