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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "mailprobe": {
      "type": "http",
      "url": "https://mailprobe.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${api_key}"
      }
    }
  }
}

claude mcp add --transport http mailprobe https://mailprobe.dev/mcp --header "Authorization: Bearer ${api_key}"

[mcp_servers.mailprobe]
url = "https://mailprobe.dev/mcp"
bearer_token_env_var = "api_key"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "mailprobe": {
      "type": "remote",
      "url": "https://mailprobe.dev/mcp",
      "enabled": true,
      "headers": {
        "Authorization": "Bearer {env:api_key}"
      }
    }
  }
}

{
  "mcpServers": {
    "mailprobe": {
      "type": "http",
      "url": "https://mailprobe.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${api_key}"
      }
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=mailprobe&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbWFpbHByb2JlLmRldi9tY3AiLCJoZWFkZXJzIjp7IkF1dGhvcml6YXRpb24iOiJCZWFyZXIgJHthcGlfa2V5fSJ9fQ%3D%3D"
}

{
  "servers": {
    "mailprobe": {
      "type": "http",
      "url": "https://mailprobe.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${api_key}"
      }
    }
  }
}

{
  "mcpServers": {
    "mailprobe": {
      "httpUrl": "https://mailprobe.dev/mcp",
      "headers": {
        "Authorization": "Bearer ${api_key}"
      }
    }
  }
}

extensions:
  "mailprobe":
    enabled: true
    name: "mailprobe"
    type: streamable_http
    uri: "https://mailprobe.dev/mcp"
    headers:
      "Authorization": "Bearer ${api_key}"
    timeout: 300

Placeholders to fill from your own secret store: ${api_key}. The registry never accepts secret values.

Quality 95 / 100strong

protocol100 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
pass
protocol.list_ttltool list is cacheable (ttlMs 3600000)

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations2 of 2 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: get_credits (destructiveHint, idempotentHint); verify_emails (destructiveHint, idempotentHint)
pass
tools.token_costabout 310 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependencies100 · weight 15

pass
deps.known_vulnsno known advisory in 1 resolved packages
n/a
deps.mcp_sdk_versionthe official MCP SDK is not in the dependency graph
pass
deps.resolvable[email protected] resolved: 1 packages

2 tools, about 310 tokens to load them all · tool set 69225f030699 · checked 2026-10-19 15:48 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 96 / 100

provenance85

liveness100

freshness100

hygiene100

+repository +dns-namespace +website +reachable +uptime-100% +updated-9d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

[email protected] npm0 dependencies, resolved · advisories checked 2026-10-19

No known advisory affects this dependency graph.

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://mailprobe.dev/mcp` streamable-http	api_key `${api_key}`	yes	100%	552 ms	2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-05	2026-10-19

package	registry	version	runtime	secrets
`mailprobe-mcp`	npm	1.1.1	–	`MAILPROBE_API_KEY`

Tools (2)

get_creditsread-only Returns the number of verification credits left on the MailProbe account that owns the API key. Reading the balance uses no credit.

verify_emailsread-only Checks whether email addresses exist and can receive mail, in real time and without sending anything. Returns one result per address, in input order. Act on `status`: `valid` is safe to send, `invalid` must not be used, `risky` is accepted but uncertain (catch-all domain, role or disposable address, provider that blocks probing) and `unknown` could not be determined. `score` is a 0-100 confidence value, `reason` explains a verdict that is not plainly deliverable and `did_you_mean` suggests a fix for a likely typo. One credit per address actually probed: duplicates and malformed addresses are free. At most 20 addresses per call: split a longer list into several calls.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "dev.mailprobe/mailprobe",
  "title": "MailProbe",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://mailprobe.dev/mcp",
      "type": "streamable-http",
      "headers": [
        {
          "name": "Authorization",
          "value": "Bearer {api_key}",
          "isSecret": true,
          "variables": {
            "api_key": {
              "format": "string",
              "isSecret": true,
              "isRequired": true,
              "description": "MailProbe API key, which starts with mp_live_"
            }
          },
          "isRequired": true,
          "description": "Your MailProbe API key, created under Developer in your account"
        }
      ]
    }
  ],
  "version": "1.1.1",
  "packages": [
    {
      "version": "1.1.1",
      "transport": {
        "type": "stdio"
      },
      "identifier": "mailprobe-mcp",
      "registryType": "npm",
      "environmentVariables": [
        {
          "name": "MAILPROBE_API_KEY",
          "format": "string",
          "isSecret": true,
          "isRequired": true,
          "description": "MailProbe API key, which starts with mp_live_, created under Developer in your account"
        }
      ]
    }
  ],
  "repository": {
    "url": "https://github.com/jamalofski/mailprobe-mcp",
    "source": "github"
  },
  "websiteUrl": "https://mailprobe.dev/api-docs/#mcp",
  "description": "Verify email addresses in real time: deliverability, disposable and role addresses, typo fixes."
}