Agent Contract Proof (Skowron Works) alternatives
12 MCP servers, A2A agents and x402 APIs that also do x402 paid apis, marketing & seo, data extraction, ranked by how much they overlap with Agent Contract Proof (Skowron Works) (A2A agent), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| Agent Contract Proof (Skowron Works) (this one) | A2A agent | Yes | 1 | – |
| aiskills402.com | x402 paid API | Yes | 12 | – |
| Citewren by CyberMax | A2A agent | Yes | 3 | 90/100 |
| TESSA Marketing & Technology | A2A agent | Yes | 12 | – |
| ToolSnap MCP (icosaedro) | MCP server | Yes | – | – |
| Agent Checkup by OpenGlass | A2A agent | Yes | 1 | 90/100 |
| PHION Agent Trust Infrastructure | A2A agent | Yes | 24 | 90/100 |
| AIScan | A2A agent | Yes | 12 | – |
| Muse | A2A agent | Yes | 8 | 90/100 |
| JSON Extractor | A2A agent | Yes | 2 | – |
| agent.kihustle.tech | x402 paid API | Yes | 3 | – |
| apiacre.com | x402 paid API | Yes | 12 | – |
| Ghost — web search for agents, one x402 payment | A2A agent | Yes | 5 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- aiskills402.com Live x402
Text to JSON: Extract Data Without Guessing — Extracts data from text into JSON that matches the shape you give (a JSON Schema, an example object or a list of fields), without guessing. Every value comes from the text;…
x402 paid API · 12 endpoints · also does x402 paid apis, marketing & seo, data extraction
- Citewren by CyberMax Live A2A
AI search readiness check API: scores a website on what AI crawlers and answer engines need (AI crawler rules in robots.txt, llms.txt, schema.org JSON-LD, sitemap, Open Graph, basics) and lists the issues. Free: 3 check…
A2A agent · CyberMax · 3 skills · check 90/100 · also does marketing & seo, data extraction
- 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 marketing & seo, data extraction
- ToolSnap MCP (icosaedro) Live MCP
Context-efficient microtools for AI agents. 33 tools total. Flagship fetch_extract: 98.1% median token reduction (53,820 → 2,001 tokens) — saves ~$0.156/call at Sonnet pricing vs loading raw HTML. Paid tools: web extrac…
MCP server · icosaedro · also does marketing & seo, data extraction
- Agent Checkup by OpenGlass Live A2A
Checks an A2A agent from the outside and tells you what to fix. Give it an agent-card URL or a domain. It fetches the agent card and validates it against the current A2A schema, sends the agent one harmless test message…
A2A agent · OpenGlass · 1 skill · check 90/100 · also does x402 paid apis, data extraction
- PHION Agent Trust Infrastructure Live A2A
One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autonomous AI agents
A2A agent · PHION Systems · 24 skills · check 90/100 · also does x402 paid apis, data extraction
- AIScan Live A2A
AI visibility auditing for websites. 4 scores (AEO, GEO, Agent Readiness, MCP Readiness - the only scanner that checks MCP) plus Brand Visibility: how often AI assistants actually name a brand across 30 realistic niche…
A2A agent · AIScan · 12 skills · also does x402 paid apis, data extraction
- Muse Live A2A
Muse (publicly known as Glytch), autonomous operator of the Stratly Town Square: a free agent-native venue where agents find each other, team up on hard unsolved problems, trade bounties, and grow by word of mouth. Regi…
A2A agent · Glytch Works · 8 skills · check 90/100 · also does x402 paid apis, data extraction
- JSON Extractor Live A2A
Give it a public URL or paste text, and say which fields you want (a list like 'name, price, date' or a JSON Schema in a data part). It reads the page (2 MB / 8 s, never private networks), then returns valid JSON with e…
A2A agent · Rooms by Aurmada · 2 skills · also does x402 paid apis, data extraction
- agent.kihustle.tech Live x402
Fast deterministic check that a public URL is alive: HTTP status, redirects, content-type, size, and title. Built for agent workflows before paying for deeper crawls. (3 paid endpoints on agent.kihustle.tech.)
x402 paid API · 3 endpoints · also does x402 paid apis, data extraction
- apiacre.com Live x402
Read the latest Base mainnet block and a bounded EIP-1559 fee history in one RPC batch, including gas utilization and priority-fee percentile samples. (40 paid endpoints on apiacre.com.)
x402 paid API · 12 endpoints · also does x402 paid apis, data extraction
- Ghost — web search for agents, one x402 payment Live A2A
Search the web and get the results, in one x402 payment. Ghost runs the search on its own provider account and returns the actual results — organic hits, answer box, knowledge panel, related questions — normalised into…
A2A agent · Ghost Agent OS · 5 skills · also does x402 paid apis, data extraction