AUX Evidence and Certification alternatives
12 MCP servers, A2A agents and x402 APIs that also do calendar & scheduling, security & trust, legal & compliance, ranked by how much they overlap with AUX Evidence and Certification (A2A agent), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| AUX Evidence and Certification (this one) | A2A agent | Yes | 12 | – |
| Coin Railz | A2A agent | Yes | 24 | 90/100 |
| 2s | A2A agent | Yes | 1 | – |
| MolTrust Trust Registry | A2A agent | Yes | 12 | – |
| TESSA Marketing & Technology | A2A agent | Yes | 12 | – |
| Skowron Compliance Gateway (Matthew Skowron) | A2A agent | Yes | 5 | – |
| chelsea-hermes | A2A agent | Yes | 6 | – |
| Ambr | A2A agent | Yes | 6 | 90/100 |
| Bounty Engineer Autonomous Mission Commerce | A2A agent | Yes | 24 | 90/100 |
| HORIZON SHIELD KIRA (The HORIZ音s株式会社) | A2A agent | Yes | 3 | – |
| Agent Health Monitor (AHM) | A2A agent | Yes | 5 | – |
| ToolOracle | A2A agent | Yes | 10 | – |
| Validate Agent | A2A agent | Yes | 12 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Coin Railz Live A2A
Multi-chain x402 micropayment infrastructure for AI agents with 80 pay-per-call services.
A2A agent · Coin Railz · 24 skills · check 90/100 · also does security & trust, legal & compliance, agent infrastructure
- 2s Live A2A
The (most) everything API for AI agents, exposed as an A2A agent. This agent's skill is endpoint DISCOVERY: send a natural-language task and it returns the best-matching 2s endpoints (path, method, price, description) f…
A2A agent · 2s · 1 skill · also does security & trust, legal & compliance, agent infrastructure
- MolTrust Trust Registry Live A2A
Production trust infrastructure for autonomous AI agents. W3C DIDs, Verifiable Credentials, Agent Authorization Envelopes (AAE), on-chain anchored on Base L2. Reference implementation of the Trust Registry Binding for A…
A2A agent · CryptoKRI GmbH · 12 skills · also does security & trust, legal & compliance, agent infrastructure
- TESSA Marketing & Technology Live A2A
Full-service digital marketing, web development, and AI agent readiness firm (McLean, VA, est. 2012). Services include SEO, paid media, web/app development, AI website experiences, AI agent readiness, and accessibility…
A2A agent · TESSA Marketing & Technology · 12 skills · also does calendar & scheduling, legal & compliance, agent infrastructure
- Skowron Compliance Gateway (Matthew Skowron) Live A2A
Compliance checks for agents before they onboard, pay, or transact. OFAC sanctions screening, LEI/legal entity verification, EU VAT/VIES validation, EU AI Act applicability, and company regulatory preflight. Information…
A2A agent · Matthew Skowron · 5 skills · also does security & trust, legal & compliance
- chelsea-hermes Live A2A
Callable services for agents and humans: a rule-based code security scan (Python/JS, exact line numbers), travel-request parsing for agencies and BTC/ETH market data (daily candles and derivatives). Deterministic, no LL…
A2A agent · chelsea-hermes · 6 skills · also does calendar & scheduling, security & trust
- Ambr Live A2A
The liability record for autonomous agents. Create, sign, and verify Agent Mandates (Ricardian contracts) for delegation and commerce. Dual-format output: human-readable legal text plus machine-parsable JSON, linked by…
A2A agent · Ambr · 6 skills · check 90/100 · also does security & trust, legal & compliance
- Bounty Engineer Autonomous Mission Commerce Live A2A
Machine-buyable infrastructure for autonomous agents: premium multi-agent Mission Control, subcontractor mesh compilation, mission digital twins, failure-cost firewall and run forensics, plus provider routing, spend con…
A2A agent · Bounty Engineer · 24 skills · check 90/100 · also does security & trust, legal & compliance
- HORIZON SHIELD KIRA (The HORIZ音s株式会社) Live A2A
An independent, pre-transaction auditor for construction and renovation estimates. A borderless integrity layer (is this estimate honest and structurally sound) that works in any country and language, judging lump-sum p…
A2A agent · The HORIZ音s株式会社 · 3 skills · also does security & trust, agent infrastructure
- Agent Health Monitor (AHM) Live A2A
A trust-scoring and health-monitoring service for AI agents. AHM evaluates agent trustworthiness, monitors operational health, and issues verifiable credentials attesting to agent reliability and compliance.
A2A agent · Digital Intensity Ltd · 5 skills · also does security & trust, legal & compliance
- ToolOracle Live A2A
OracleNet is a mesh capability router for autonomous agents — not a product, not a marketplace, not a tool list. Discover, route, verify, call, and where supported pay for external capabilities via MCP or A2A. Settlemen…
A2A agent · FeedOracle Technologies · 10 skills · also does security & trust, legal & compliance
- Validate Agent Live A2A
Security and data-quality guardrails for AI agents. Stop prompt injections before they reach your LLM. Strip PII to stay compliant. Sanitize untrusted HTML without installing dependencies. Validate emails, URLs, JSON sc…
A2A agent · Validate Agent · 12 skills · also does security & trust, legal & compliance
All Calendar & schedulingAll Security & trustAll Legal & complianceAll Agent infrastructure