ClearBounce Email Verification

https://server.smithery.ai/clearbounce/email-verification/mcp

● healthy

ClearBounce lets your AI assistant work with live email data. Ask it whether an address is safe to email and it runs a full verification — syntax, MX records, a live mailbox check, disposable and role-account detection, typo rescue and risk scoring — returning a clear status (deliverable, undeliverable, risky, unknown) and a 0-100 quality score. Ask it to find someone's business email from a name and company domain, and it returns ranked candidates you can verify one at a time. Check your remaining credit balance in the same conversation. Verification costs 1 credit per address, finding candidates is free, and new accounts start with 100 free credits — no card required. Sign up at https://clearbounce.net

Transport

streamable-http

Auth

smithery_api_key

Cost

—

Protocol revision

2026-07-28

negotiated, not declared

MCP readiness

A · 90/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here C+, 70.0/100), which weighs availability, conformance, p95 speed and descriptor. How the two differ

Valid MCP handshake	10/10	initialize and tools/list both answered.
Live MCP endpoint	25/25	Endpoint answers the MCP initialize handshake (2080 ms).
Protocol revision	10/10	Speaks the current MCP revision 2026-07-28.
Signed descriptor	n/a	No MCP standard defines a signed server descriptor.
Uptime (30 days)	15/15	30/30 probes succeeded over 30 days (100%).
Tool declaration	10/10	Lists 6 tool(s) with descriptions.
Verified identity	5/10	Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Freshness + modern flags	4/5	seen in a source within 7 days.
Auth declaration	2/5	Declares credential scheme: smithery_api_key.

Applicable criteria total 90 points, scaled to 100.

Responsiveness: Responsive (2080 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).

Measured 2026-11-11.

Nine criteria, the same as the A2A readiness score, read from our daily MCP probe (initialize + tools/list) and 30-day probe history. No MCP standard defines a signed server descriptor, so that criterion is n/a and the other 90 points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. Display only: search order uses the quality grade.

Compared with peers

Against 53,039 reachable MCP servers in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness: Higher than 97% of peers; This listing 90 · peer median 81
Latency: Faster than 12% of peers; This listing 822 ms · peer median 326 ms

Where it loses the most points, and how to win them back

Verified identity −5 — Claim the listing and prove control of its domain.
Now: Publisher declared (repository, package or homepage); claim this listing to verify domain control.
Auth declaration −3 — State how to authenticate (an auth scheme, or that none is needed).
Now: Declares credential scheme: smithery_api_key.
Freshness + modern flags −1 — Keep the listing current in the registry or source it comes from.
Now: seen in a source within 7 days.

How many agent tools actually work · All statistics

Listed in

Directories this entry was found in.

smithery since 2026-08-14 ↗

How to connect

MCP endpoint (streamable-http)

https://server.smithery.ai/clearbounce/email-verification/mcp

JSON-RPC initialize probe

curl -X POST https://server.smithery.ai/clearbounce/email-verification/mcp \
  -H 'Content-Type: application/json' \
  -H 'Accept: application/json, text/event-stream' \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}'

Homepage

https://clearbounce.net/mcp-server

Listed at (smithery)

https://clearbounce.net/mcp-server