MailValid MCP server

Which servers in the official MCP registry are MailValid's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-19

← Back to MailValid

Whose server it is

Registry nameio.mailvalid/email-verifierverified in the MCP registry

The registry name sits under mailvalid.io. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-19

Stateanswerschecked 2026-10-19
Tools6
Server calls itselfMailValid
Server version1.28.0
Protocol version2025-06-18

On 2026-10-19 the server answered initialize and tools/list without a sign-in. First answer in 94 ms.

Measured dailydaily checks: 2, the first on 2026-10-19

Answeredmeasuring2 of the 7 daily checks it takes to print a share
Median first answer332 ms
Space in an agent's context≈ 610 tokensthe definitions of all its tools (6), which an agent carries on every turn
Tool definitionsB · 86 of 100

Parameters without a description: in 5 of 6

Worth a look

Tools that change data, on a server that answers without a sign-in: cancel_bulk_job

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The state of vendors' MCP servers: method and numbers →

Tools it offers6 tools · read 2026-10-19

verify_email
Verify a single email's deliverability (syntax, DNS/MX, SMTP mailbox, disposable / role / catch-all detection, confidence score). Costs 1 credit for a billable result (valid/invalid/catch_all/do_not_mail), whether fresh or served from…
submit_bulk_verification
Queue a list of emails for asynchronous verification. Reserves up to N credits (final charge settles on completion). Poll get_bulk_job for status and results. Optionally provide webhook_url for a completion callback. Requires an API key…
get_bulk_job
Get the status, progress, and (when complete) results of a bulk job by its job_id. Requires an API key.
list_bulk_jobs
List your recent bulk verification jobs (paginated, newest first). Optionally filter by status. Requires an API key.
cancel_bulk_job
Cancel a pending or processing bulk job and release any reserved credits. Requires an API key.
get_credit_balance
Return your current credit balance and lifetime usage. Requires an API key.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "email-verifier": {
      "type": "http",
      "url": "https://mailvalid.io/mcp/"
    }
  }
}

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.