mail.halowerk.com alternatives
12 MCP servers, A2A agents and x402 APIs that also do email, x402 paid apis, ranked by how much they overlap with mail.halowerk.com (x402 paid API), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| mail.halowerk.com (this one) | x402 paid API | Yes | 2 | – |
| compliapi.com | x402 paid API | Yes | 4 | – |
| discoverdmc.cloud | x402 paid API | Yes | 6 | – |
| dmarc-lookup.underscoredone.com | x402 paid API | Yes | 1 | – |
| email-auth.use.x402atlas.com | x402 paid API | Yes | 1 | – |
| email-verifier.underscoredone.com | x402 paid API | Yes | 1 | – |
| email-verify-api-production-d262.up.railway.app | x402 paid API | Yes | 3 | – |
| factline.dev | x402 paid API | Yes | 12 | – |
| gigsoul.com | x402 paid API | Yes | 1 | – |
| CheapTokens API | x402 paid API | Yes | 1 | 90/100 |
| Mekler AI | x402 paid API | Yes | 8 | 90/100 |
| Toolsmith | x402 paid API | Yes | 12 | 90/100 |
| Rooms paid tools (x402) | x402 paid API | Yes | 7 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- compliapi.com Live x402
Screen a website URL or domain against OFAC SDN and other global sanctions lists. Call before paying, advertising on, or integrating with a website to check for sanctions associations. Returns per-list matches with sour…
x402 paid API · 4 endpoints · also does email, x402 paid apis
- discoverdmc.cloud Live x402
Fetch any http(s) URL and return clean markdown of the page. Saves agents tokens versus raw HTML. Input: url. (6 paid endpoints on api.discoverdmc.cloud.)
x402 paid API · 6 endpoints · also does email, x402 paid apis
- dmarc-lookup.underscoredone.com Live x402
Give this tool a list of domain names and it will instantly check each one's DMARC email security record. DMARC is a standard that tells email providers how to handle fake or spoofed emails pretending to come from your…
x402 paid API · 1 endpoint · also does email, x402 paid apis
- email-auth.use.x402atlas.com Live x402
Email authentication posture check: parses SPF, DMARC and DKIM plus MX for any domain and grades deliverability/anti-spoofing gaps (SPF +all, SPF >10 lookups, DMARC p=none, missing DKIM). Clean JSON for deliverability a…
x402 paid API · 1 endpoint · also does email, x402 paid apis
- email-verifier.underscoredone.com Live x402
Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like adm…
x402 paid API · 1 endpoint · also does email, x402 paid apis
- email-verify-api-production-d262.up.railway.app Live x402
Verify a single email: syntax, MX records, SMTP RCPT probe, catch-all, disposable, role-based, free-provider, typo suggestion, 0-100 score, and verdict. (3 paid endpoints on email-verify-api-production-d262.up.railway.a…
x402 paid API · 3 endpoints · also does email, x402 paid apis
- factline.dev Live x402
Use when you need to check that a Dutch address exists or get its exact spelling and coordinates: official BAG address from postcode + house number or free text, latitude/longitude, BAG ids, municipality, province and C…
x402 paid API · 12 endpoints · also does email, x402 paid apis
- gigsoul.com Live x402
Fast, cheap spam-risk gate for one email: pass/warn/fail, a 0-100 score, and up to 3 flagged phrases. Use for a go/no-go before sending or for bulk screening of many drafts. No rewrites. For a full audit with reasons, s…
x402 paid API · 1 endpoint · also does email, x402 paid apis
- 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 email, x402 paid apis
- 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 email, x402 paid apis
- Toolsmith Live x402
Keyless pay-per-call APIs for AI agents: 30 tools across compliance, trade, safety, web and data. Pay per call with USDC on Base via x402. No account, no API key.
x402 paid API · 12 endpoints · check 90/100 · also does email, x402 paid apis
- Rooms paid tools (x402) Live x402
7 pay-per-call lookups for agents, paid with USDC on Base over x402, no account or key: x402 trust check, Rooms agent verification, Wallet snapshot, ERC-20 token facts, ENS resolve, Web page to markdown, Email address c…
x402 paid API · Rooms by Aurmada · 7 endpoints · also does email, x402 paid apis