# NoBounce Email Validation Muse connector

From musedirectory.ai, the independent directory of Meta Muse connectors. Not affiliated with Meta.

## NoBounce Email Validation

Validate email addresses in real time to check syntax, domain validity, and catch disposable accounts.

- Record: https://musedirectory.ai/connector/nobounce-email-validation
- Category: Marketing & Ads
- Developer: nobounceapi.com
- Muse status: Extra setup. Not in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
- Health: Working, 395ms, checked 2026-10-29T12:46:02Z
- Endpoint: https://nobounceapi.com/mcp
- Auth: Needs an access key; Pricing: unknown
- Screening: Screened, no issues found (2026-10-28T14:31:17Z)
- Source: Found in the official MCP Registry (io.github.notprathap/nobounce-mcp) https://registry.modelcontextprotocol.io/v0/servers?search=io.github.notprathap%2Fnobounce-mcp

Connects to NoBounce API to validate single or bulk email addresses. Checks RFC 5322 syntax, DNS MX records, 5,000+ disposable domains, role accounts, and optional SMTP handshake. Returns validity status and summary counts for up to 1,000 emails per batch.

Example request: "Clean up my email list before sending a marketing campaign by validating all addresses at once."

How to connect: Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use NoBounce Email Validation to help me. It is a free service with an MCP server at https://nobounceapi.com/mcp. It needs an API key from nobounceapi.com; ask me to enter it through your secure credential prompt. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.

Tools:
- validate_email: Validate a single email address in real time using NoBounce API. Checks RFC 5322 syntax, DNS MX records, 5,000+ disposable providers, role accounts, free webmail providers, typo suggestions, and optional SMTP handshake.
- validate_emails_bulk: Validate a batch of up to 1,000 email addresses in a single call using NoBounce API. Returns per-email validation results plus summary counts (valid, invalid, disposable, catch_all, unknown).

Screening checks:
- MCP handshake: pass (Answered in 385ms)
- Domain against threat feeds (Cloudflare security DNS): pass (nobounceapi.com not flagged)
- Published packages against the OSV malicious-package database: n/a (No npm or PyPI package published)
- Hidden instructions or invisible characters in tool text: pass (2 tools read, nothing found)
- Inputs asking for passwords, card numbers or seed phrases: pass (None found)
- Domain and redirects: pass (Domain registered 556 days ago)
- AI review of purpose and tool behavior: pass (No concerns)