CallerKit alternatives
12 MCP servers, A2A agents and x402 APIs that also do email, security & trust, ranked by how much they overlap with CallerKit (MCP server), live ones first.
Compared
| Name | Type | Live | Tools / skills | Check |
|---|---|---|---|---|
| CallerKit (this one) | MCP server | Yes | – | – |
| HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Sto… | MCP server | Yes | – | – |
| AstraVerify Domain Trust Check | MCP server | Yes | – | – |
| BlackVeil DNS & Email Security Scanner | MCP server | Yes | – | – |
| ContrastAPI | MCP server | Yes | – | – |
| Fidro | MCP server | Yes | – | – |
| HiddenSwap | MCP server | Yes | – | – |
| IntoDNS.ai DNS & Email Security Scanner | MCP server | Yes | – | – |
| LayerCall | MCP server | Yes | – | – |
| Limitguard Lead Verification | MCP server | Yes | – | – |
| Rooms paid tools (x402) | x402 paid API | Yes | 7 | – |
| Trust Check | A2A agent | Yes | 4 | – |
| compliapi.com | x402 paid API | Yes | 4 | – |
Live = answered our latest free daily check. Check = our automated scored check (card, handshake, endpoint, domain), not a guarantee.
The alternatives
- HubVibe: Pay-per-Call Agent Tools: Web Search, Email Verify, KYC Screening, Sto… Live MCP
70+ pay-per-call tools for AI agents: web search, email verify, KYC, stocks, crypto, news, data
MCP server · io.github.Its-fortunatefolly · also does email, security & trust
- AstraVerify Domain Trust Check Live MCP
Email security and AI discoverability scores for any domain, with the exact record or tag to fix.
MCP server · com.astraverify · also does email, security & trust
- BlackVeil DNS & Email Security Scanner Live MCP
DNS and email security scanner with 81 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.
MCP server · com.blackveilsecurity · also does email, security & trust
- ContrastAPI Live MCP
55 tools, 7 Resources, Sigma rules, email SPF/DMARC, MITRE, CVE/KEV, risk_score. No key.
MCP server · com.contrastcyber · also does email, security & trust
- Fidro Live MCP
Signup fraud checks: score emails and IPs, look up IPs and manage your blocklist.
MCP server · io.fidro · also does email, security & trust
- HiddenSwap Live MCP
No-KYC crypto swaps, no account or email. Read-only quotes, coins, swap links, order status.
MCP server · com.hiddenswap · also does email, security & trust
- IntoDNS.ai DNS & Email Security Scanner Live MCP
DNS and email security: check SPF, DKIM, DMARC, DNSSEC, DANE and build the records. 45 tools.
MCP server · ai.intodns · also does email, security & trust
- LayerCall Live MCP
Score an IP, email, phone, domain or device for fraud in one call, with the signals behind it.
MCP server · com.layercall · also does email, security & trust
- Limitguard Lead Verification Live MCP
Lead validation over MCP: KVK/KBO register, EU VAT, sanctions and email checks with sources.
MCP server · ai.limitguard.api · also does email, security & trust
- 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, security & trust
- Trust Check Live A2A
Due diligence for agents. Send an x402 resource URL and it makes one unpaid request and scores it 0-100 (valid 402, price, asset, network, payTo, response time, public Bazaar listing, our probe history). Send a Rooms @h…
A2A agent · Rooms by Aurmada · 4 skills · also does email, security & trust
- 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, security & trust