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Standalone MCP directory — 61862 servers across 36145 domains, each exposing a remote (streamable-http) endpoint and health-probed via a JSON-RPC initialize handshake.

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Aggregated from the official MCP Registry, Smithery and other public registries, plus our own crawling and operator submissions. Every server is de-duplicated by endpoint, health-probed via a live JSON-RPC initialize handshake, and statically scanned for malware & prompt-injection patterns in its advertised tools before listing — yielding 61862 indexed servers, of which 53021 answered within the last 6 h.

Indexed
61862 servers
36145 domains
+4109 new this week
Healthy
53021 servers
31253 domains
initialize handshake < 6 h
Conformant
35921 servers
19177 domains
tools/list verified · ~1350ms p95
x402-capable
30 servers
26 domains
accepts x402 payment

Top rated

by quality score · health · trust signals
# Tool Grade Score
1 Homo Universalis — HU-DIAMOND v1.1 Cryptographic Verifier & AST Kintsugi MCP Server A 10.000
2 FlowState Hosted A 10.000
3 Verified x402 Catalog A 10.000
4 True Value Rankings A 10.000
5 X402-Broker Universal MCP Gateway & Multi-Agent Swarm Router A 10.000
6 GraphQL operation count, query discarded A 9.998
7 Paper Search (arXiv + Semantic Scholar + OpenAlex) A 9.994
8 BNF production count, body discarded A 9.994
9 multibase z-prefix, value discarded A 9.994
10 Liters to US gallons A 9.994
11 Slugs to kilograms, number discarded A 9.992
12 Sponsored Agent Placement A 9.991
13 UUID v7 unix-ms layout, value discarded A 9.991
14 Train-Case segment count, text discarded A 9.991
15 Utility 87 A 9.991
16 Utility 43 A 9.991
17 Asia/Sakhalin clock A 9.991
18 GitHub topic slug charset, value discarded A 9.989
19 Utility 18 A 9.989
20 pyproject.toml table count, body discarded A 9.989

All MCP servers

Continuously aggregated · refreshed daily.

/api/v1/mcp/stats

Access model — Open: callable with no credentials · Human key: a person must provision an API key/OAuth first · Agent-pays: agent settles each call on-chain (x402)

“B2B Email & Domain Scorer” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Dead Simple Email” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.
  • Dead Simple Email https://api.deadsimple.email/mcp
    mcp ok

    Give an agent its own inbox: send, receive, and pull signup codes from real email.

  • Dead Simple Email https://server.smithery.ai/deadsimple/dead-simple-email/mcp
    mcp ok

    Give your agent its own email inbox. Create inboxes on demand, send and receive real email, reply on-thread, and pull one-time signup codes and magic links straight out of inbound mail — so an agent can sign itself up for a service or clear 2FA without ever parsing an email body. Real delivery infrastructure behind it: DKIM-signed sending, bounce and complaint handling, suppression lists, and HMAC-signed webhooks. Get a key with no signup form: POST https://api.deadsimple.email/v1/auth/agent-signup

“Email Check” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Email Server” is shared by 5 different URLs

All exact-name matches are shown; ranked results follow.

“email-verifier” is shared by 2 different URLs

All exact-name matches are shown; ranked results follow.

“Mailvett: Email Validation API for AI Agents” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.

“Qualisend Email Verification” is shared by 3 different URLs

All exact-name matches are shown; ranked results follow.
  • Qualisend Email Verification https://app.qualisend.com/api/mcp
    mcp ok

    Verify email addresses and clean lists to improve deliverability and sender reputation.

  • Qualisend Email Verification https://server.smithery.ai/hello-ovtj/qualisend/mcp
    mcp ok

    Qualisend verifies email addresses and cleans lists in real time to protect deliverability and sender reputation. Ask an agent to check a single address, a batch, or a whole list. Qualisend runs the full pipeline (syntax, domain/MX, disposable, role, catch-all, and a live SMTP mailbox probe) and returns a deliverable / risky / undeliverable / unknown verdict with a 0-100 confidence score. Tools (12) - `verify_email` - verify one address - `verify_emails` - verify a ba - `verify_list` - verify a whol - `get_credit_balance`, `get_ves and look up past results - `check_domain`, `generate_dnseader`, `check_disposable`,`check_typo`, `lookup_smtp_code` - deliverability tools (Pro plan) - `check_blacklist` - blacklist / DNSBL checks (Blacklist Monitoring add-on) Auth: OAuth 2.1 (connect wi no key copying) or an API key.New accounts get 100 free credits that never expire. Website: https://www.qualisend.com Docs: https://www.qualisend.com

  • Qualisend Email Verification https://www.qualisend.com/mcp
    mcp degraded

    Qualisend verifies email addresses and cleans lists in real time to protect deliverability and sender reputation. Ask an agent to check a single address, a batch, or a whole list. Qualisend runs the full pipeline (syntax, domain/MX, disposable, role, catch-all, and a live SMTP mailbox probe) and returns a deliverable / risky / undeliverable / unknown verdict with a 0-100 confidence score. Tools (12) - `verify_email` - verify one address - `verify_emails` - verify a ba - `verify_list` - verify a whol - `get_credit_balance`, `get_ves and look up past results - `check_domain`, `generate_dnseader`, `check_disposable`,`check_typo`, `lookup_smtp_code` - deliverability tools (Pro plan) - `check_blacklist` - blacklist / DNSBL checks (Blacklist Monitoring add-on) Auth: OAuth 2.1 (connect wi no key copying) or an API key.New accounts get 100 free credits that never expire. Website: https://www.qualisend.com Docs: https://www.qualisend.com