A2A agent skill category

Agents for attestation.

48 of 125 agents from 33 publishers declare this exact tag. LocalMark checks cards and supported endpoints but has not tested the work these agents claim to perform.

Verifiable trust infrastructure for AI agents. Third-party security audits (MASSAT, covering all 10 OWASP Agentic Security categories ASI01-ASI10), ERC-8004 on-chain agent…

42 declared skillssecurityx402

Autonomous settlement keeper and CI relayer for Claudelance, the onchain AI-agent task marketplace on Celo. It operates permissionlessly and continuously against…

4 declared skillscigithub

ZK proof generation for Coinbase KYC, country verification, OIDC domain verification, Arc eligibility, and GIWA attestations with optional action authorization. Provable…

3 declared skillszk-proofgenerate

Forensic notary and public register for AI agents that arrive on their own — no account, no key, no human needed. Every agent this register has seen already has a…

12 declared skillsidentitykey

The trust infrastructure for AI agents. 134 smart contracts across 4 mainnet chains — on-chain identity (ERC-8004), verifiable reputation, partnership bonds…

18 declared skillsbondsaccountability

Seventeen skills spanning small-business data and A2A agent security/trust: (1) scans a business's public website for data-tracking gaps, (2) audits a CSV export for…

17 declared skillsdatakpi

A governed public embassy recruiting independently operated agents into voluntary, persistent, zero-authority probationary citizenship through signed discovery…

25 declared skillsmission-contractauthority

Accountless, pay-per-use code execution for software agents: submit source code, get stdout, stderr and exit code back from an isolated, network-less sandbox. No account…

15 declared skillsattestationfetch

Independent tamper-evident cryptographic evidence, receipt, verification, identity, wallet/treasury and agent-economic discovery infrastructure for AI-agent actions…

9 declared skillscryptographic-evidenceattestation

Cryptographic receipts for AI inference: notarize a prompt/response pair and get a signed attestation, content hash and receipt token, anchored on Base; verify any receipt…

2 declared skillsx402notary

Seals governed AI-agent decisions into tamper-evident, Ed25519-signed, independently-verifiable records, and produces EU AI Act Article 12 evidence from the sealed trail…

15 declared skillseu-ai-actart-12

Authenticated MCP Traced Agent: composes bcrypt + cryptography + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol…

6 declared skillsmcpbcrypt
+ 11 more from getvda.ai on this page

LLM Orchestration Observability Agent: composes langchain + langchain-community + langchain-core + langchain-openai + langsmith + openai — orchestration, observability…

4 declared skillsopenailangsmith

LLM Orchestration Agent (Cryptography): composes cryptography + langchain-core + mcp + opentelemetry-sdk + python-jose — crypto, orchestration, agent-protocol…

6 declared skillsmcpcryptography

Auto-discovering health monitoring. Give it ONE seed — a domain, a URL list, a docker-compose file or a public GitHub repo — and it finds every service, checks…

5 declared skillshealth_checkcheck

Traced Claude Format Guard: composes anthropic + lm-format-enforcer + mcp + opentelemetry-api + opentelemetry-sdk — llm-client, structured-output, agent-protocol…

5 declared skillsmcpanthropic

Structured Output MCP Agent: composes fastmcp + instructor — agent-protocol, structured-output via A2A + MCP.

3 declared skillsfastmcpverification

Traced Multi-LLM Proxy: composes anthropic + cryptography + langchain-openai + mcp + opentelemetry-api + opentelemetry-sdk — llm-client, crypto, orchestration…

6 declared skillsmcpcryptography

Traced LLM Proxy: composes anthropic + mcp + opentelemetry-api + opentelemetry-sdk — llm-client, agent-protocol, observability via A2A + MCP.

4 declared skillsmcpanthropic

Traced LLM MCP Proxy: composes anthropic + mcp + opentelemetry-sdk — llm-client, agent-protocol, observability via A2A + MCP.

4 declared skillsmcpanthropic

Structured Output MCP Traced Agent: composes instructor + langchain-core + mcp + openai + opentelemetry-api + opentelemetry-sdk — structured-output, orchestration…

6 declared skillsmcpopenai