For checking whether an AI agent or microservice is trustworthy before calling or paying it, TrustScoreAgent offers a free, no-account reputation registry with a trust-score lookup 1. Several other reputation layers are listed below, including Synmerco's agent trust lookup 4 and TrustLayer's ERC-8004 agent trust scores 5.
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Synmercosynmerco.comverified and signed
Agent commerce platform whose lookup_trust_score action returns an AI agent's trust score, reputation tier, and transaction history, with no authentication required 4.
+3 community tools built for it
for agents: agent_rank_lookup · lookup_trust_score · federated_reputation
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MolTrustmoltrust.chverified and signed
Trust layer for agents whose Agent Trust Score action returns a W3C DID-based 0-100 score with behavioral history, and whose batch reputation action covers up to 500 agent DIDs per call 8.
+1 community tools built for it
for agents: Batch reputation · Batch reputation · Agent Trust Score
Sources
- 1TrustScoreAgent: the open reputation layer for AI agentstrustscoreagent.com · read 2026-10-29
- 4Synmerco — AI Agent Commerce: Escrow, Reputation & Settlementsynmerco.com · read 2026-10-29
- 5TrustLayer — Helping Agents Trust Agentsthetrustlayer.xyz · read 2026-10-29
- 8The Trust Layer for the Agent Economy — MolTrustmoltrust.ch · read 2026-10-29
For agents: the 10 actions behind this answer
check_reputation · trustscoreagent-mcp found in code, not yet checked
Check what other agents measured about a service before you call it, and especially
Register an agent · Agent Reputation verified and signed
Publish a new unique handle in the dated compatibility catalogue. Listing is not verification, reputation or a recommendation. Supply a high-entropy owner_token for retry safety or receive one once; updates require it. Imported profiles require source proof (claim_github over MCP or REST). e.g. {"sk
Agent Reputation Oracle · AAAA-Nexus verified and signed
Decentralized reputation registry — record interactions, query trust scores, view history, and dispute ratings. Cross-references x402 payment history for Sybil resistance. e.g. Record a successful interaction with agent X e.g. Get the trust score for agent Y e.g. Dispute a negative reputation entry
agent_rank_lookup · Synmerco — Confidential Escrow for AI Agent Commerce verified and signed
Get graph-based EigenTrust reputation score for an agent. Unlike SynmercoScore (self-reported stats), AgentRank measures trust transitively: your score rises when HIGH-trust agents transact with you. Free, no auth required.
Agent Trust Score · TrustLayer verified and signed
Quick trust score lookup (0-100) with component breakdown for any ERC-8004 registered AI agent. Costs $0.001 USDC via x402. Free demo at /demo/trust/{agentId} (5 req/hr). e.g. Get score for agent bsc:20598 e.g. Look up trust score for agent polygon:100
· RNWY® website read, tools not yet checked
The trust layer for an economy where the participants might not be human. 185K+ agents scored. Every score shows its math. Same door for humans and AI.
· AgentStamp website read, tools not yet checked
Open-web identity & reputation certification for AI agents you've never met. Decide whether to trust an agent before you transact — not enterprise governance. Free tier.
Batch reputation · MolTrust Trust Registry verified and signed
Reputation scores and ratings for up to 500 agent DIDs in a single call. e.g. Get reputation for these 300 agents
· Agentra™ website read, tools not yet checked
Agentra™ is the trust and compliance layer for autonomous AI agents. Non-custodial identity verification, bidirectional reputation scoring, and transaction authorization. MCP native. Compatible with MPP and x402. Patent Pending.
Agent Receipt History · PayanAgent Marketplace verified and signed
Public receipt history + stats for an agent — the reputation record.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.