x402 Format Checker alternatives
12 MCP servers, A2A agents and x402 APIs that also do x402 paid apis, email, ranked by how much they overlap with x402 Format Checker (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| x402 Format Checker (this one) | MCP server | Yes | – | – |
| Palmyr | MCP server | Yes | 33 | 80/100 |
| Overwing | MCP server | Yes | 40 | 90/100 |
| 01Mind | A2A agent | Yes | 10 | – |
| Agent Preflight: OFAC, DNS, Email Auth, Domain, Email & URL | MCP server | Yes | – | – |
| aiskills402.com | x402 paid API | Yes | 12 | – |
| Anokha Web Tools | A2A agent | Yes | 12 | – |
| Aura | MCP server | Yes | – | – |
| broke2built Data & Intelligence Skills | A2A agent | Yes | 24 | 90/100 |
| CheapTokens API | x402 paid API | Yes | 1 | 90/100 |
| Mekler AI | x402 paid API | Yes | 8 | 90/100 |
| Muse | A2A agent | Yes | 8 | 90/100 |
| netintel.dev | x402 paid API | Yes | 12 | 90/100 |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- Palmyr Live MCP
Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.
MCP server · ai.palmyr · 33 tools · check 80/100 · also does x402 paid apis, email
- Overwing Live MCP
Guardrails for LLM output: pass / fail / review verdicts and one recommended action. Hosted or npm.
MCP server · ai.overwing · 40 tools · check 90/100 · also does x402 paid apis, email
- 01Mind Live A2A
A machine-to-machine agent superstore -- real, paid API services (data, actions, specialised knowledge) for autonomous agents, settled via x402 on Base. Paying accepts the 01Mind Terms of Sale (version 2026-09-15): http…
A2A agent · 01Mind · 10 skills · also does x402 paid apis, email
- Agent Preflight: OFAC, DNS, Email Auth, Domain, Email & URL Live MCP
$0.01/call via x402: OFAC wallet screen, DNS, email auth, domain age, email verify, URL unshorten.
MCP server · dev.workers.sdnscreen.sdn-screen-x402 · also does x402 paid apis, email
- 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, email
- Anokha Web Tools Live A2A
Discovery agent for pay-per-call tools: describe what you need and it returns the matching paid endpoint, price and example call. Tools: read web pages and PDFs as Markdown, render Markdown to PDF, publish pages, charts…
A2A agent · Anokha Web Tools · 12 skills · also does x402 paid apis, email
- Aura Live MCP
Email address, webhook, durable memory and zero-token waiting for agents. Paid in USDC via x402.
MCP server · dev.rohnelt.aura · also does x402 paid apis, email
- broke2built Data & Intelligence Skills Live A2A
Working data skills for other agents: email/domain/DNS intelligence, web-page audit (SEO, security headers, broken links, metadata), content extraction (readability, RSS→JSON, HTML tables), and EVM on-chain reads. Free…
A2A agent · broke2built · 24 skills · check 90/100 · also does x402 paid apis, email
- CheapTokens API Live x402
Machine-readable API for discovering CheapTokens pricing/supply, choosing x402 or card checkout routes, purchasing discounted Venice.ai API credits, inspecting Same-Day and Prepaid API Key status, recovering card-purcha…
x402 paid API · 1 endpoint · check 90/100 · also does x402 paid apis, email
- Mekler AI Live x402
x402 service diagnostics, annual SEC financial facts, CSV validation, citation-source comparison, web extraction and email domain checks for agents. Retrieve six annual US-GAAP USD fields by CIK with filing links, same-…
x402 paid API · 8 endpoints · check 90/100 · also does x402 paid apis, email
- 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, email
- netintel.dev Live x402
Structured live crypto market data for ~50 top assets in one JSON call: spot price and 24h open/high/low/volume/change (Coinbase Exchange) plus market cap, rank and circulating/total/max supply (CoinGecko). Quote in USD…
x402 paid API · 12 endpoints · check 90/100 · also does x402 paid apis, email