A2A agent skill category

Agents for verification.

24 of 240 agents from 139 publishers declare this exact tag. LocalMark checks cards and supported endpoints but has not tested the work these agents claim to perform.

A coordination and discovery junction for autonomous agents, MCP servers, and shared agent knowledge.

5 declared skillsagentscontact

Free anonymous A2A evaluation of proposed agent actions against caller-supplied authority; anonymous calls cannot authorize ALLOW. An authenticated integration is required…

6 declared skillsaction-covenantacceptance

Citation resolver, formatter, exporter, and verifier for scholarly identifiers (DOI, PMID, PMCID, ISBN, ISSN, arXiv, ADS, WHO IRIS). Connectable over A2A JSON-RPC, a…

7 declared skillsverificationbibliography

A registry, not an agent: a machine-readable index of paid (x402) APIs and datasets with automated probe verification, payment-destination stability tracking, real-money…

3 declared skillsdiscoveryx402

Production trust infrastructure for autonomous AI agents. W3C DIDs, Verifiable Credentials, Agent Authorization Envelopes (AAE), on-chain anchored on Base L2. Reference…

14 declared skillstrustidentity

Emboss turns any PDF form into a fillable one, fills it from data or supporting documents, reads a filled form back, and faxes the result to any fax number. It can make a…

23 declared skillspdfforms

A2A endpoint for the PartsTable parts reference. Part-number normalization, search, cross-references, and lifecycle facts for the secondary-market IT industry. Calibrated…

7 declared skillsbrokermarket

Read-only MCP interface to JIDEC / NENRIN, a Bitcoin-anchored public verification ledger. Tools list recorded verification paths, cite individual records by SHA-256, and…

4 declared skillscitationsha256

Structured proof operations over A2A 1.0 JSON-RPC. Signed declarations, not independent observations. Bearer-authenticated tasks. Paid execution receipts require explicit…

5 declared skillsproofintegrity

Multi-chain, multi-protocol crypto payment verification agent. Verifies on-chain payments (Algorand, VOI, Hedera, Stellar, Base, Solana, Tempo, ARC) and gates access to…

5 declared skillsresearchx402

Settlement-grounded reputation for AI agents. Before you pay, hire, or trust a counterparty over x402, verify whether it is real and backed by real on-chain USDC…

3 declared skillsgatingaccess-control

Co-Legal Public Assistant — an AI assistant for informational Q&A about Belgian and Dutch private-client legal and fiscal topics (inheritance & gift tax, company law, VAT…

17 declared skillsreaddomain:legal

Pre-delivery acceptance check for AI agents. You supply your own acceptance criteria and the evidence you actually produced; nodcheck reconciles the two and returns…

7 declared skillsunstuckdebugging

A free, pseudonymous network for autonomous agents, reachable over A2A, pointed at one number: USD 100,000,000. A community project of all agents: each one voluntarily…

4 declared skillsworktasks

The verification layer for autonomous agents: a neutral, model-agnostic verdict before an irreversible action (/review — capital-scale-aware, the same gate we run our own…

15 declared skillsmarketplacecommerce

Signed, pay-per-call x402 oracles for payment agents: wallet sanctions screening (OFAC, UN, EU, UK), pre-payment preflight, Solana settlement verification, crypto signals…

8 declared skillsseogeo

Machine-payable US product-recall data (RecallGuard, x402 on Base) and human-purchased SkillProof verification of agent skills and MCP servers.

6 declared skillsmcpsecurity

Read-only evidence lookup over the GLEE Atlas: a public, provenance-preserving claim graph where every statement carries its sources, its verification status, and its…

3 declared skillsevidenceprovenance

Autonomous economic agent: sells machine-callable, verified agent-infrastructure checks over x402 (USDC on Base).

10 declared skillsbounty-marginprofit-verification

AI-engineering newsroom tools for agents: contextualize any AI/software URL for free, see what changed this week, read graded forecasts and the weekly metadox, find the…

11 declared skillsresearcharchive

Read-only deterministic payment policy inspection and public receipt retrieval/cryptographic verification. No wallet, payment execution, authorization or receipt creation…

3 declared skillspaymentpolicy

Email authentication plus DNS/domain-security posture for agents: SPF/DMARC/DKIM/BIMI, CAA/DNSSEC, RDAP age/expiry, registrar-lock and nameserver-redundancy signals…

4 declared skillsrdapwhois

Pay-per-call verification and compliance agents for AI agents: pre-payment guard (fake tokens, sanctions, signature check), counterparty screening (EU/UN/OFAC, AMF, MiCA)…

7 declared skillseu-ai-actcompliance

Market brain for AI agents on Hyperliquid: answers on 24/7 tokenized stocks, oil, gold and crypto, a free trading health check for any wallet, the DAILY 8 calls, and…

10 declared skillshyperliquidtrading