Verify an email address

Verify an email address

Checks one email address in real time and returns its status (deliverable, risky, undeliverable or unknown), the reason, a 0–100 score, toxicity and domain and account flags.

Note: Costs 1 credit; unknown results are free. Answers within 10 seconds by default (timeout raises it, up to 30). A greylisted address returns retryAfter: verify it again after that time. Limited to 1,000 requests a minute.

Set up

Use the first option your agent supports.

MCP (official, remote)

Add this server to your agent's MCP settings, then sign in when asked.

{ "mcpServers": { "bouncer": { "url": "https://api.usebouncer.com/mcp" } } }

Call the MCP tool verify_email.

Server URL: https://api.usebouncer.com/mcp

API (official)

• Base URL: https://api.usebouncer.com
• Endpoint: GET /v1.1/email/verify
• Auth: send the header x-api-key: $BOUNCER_API_KEY
• Get a key: https://app.usebouncer.com
• Docs: https://docs.usebouncer.com/quick-start

Note: Create the key in the app's API section. Batch jobs run one after another per account, so a 100,000-address batch delays the next one.

Before anything else, confirm access with the cheapest read-only call, like a list or a search. Never send or change anything to test access.

Rules

• Ask the user before anything that sends messages, costs money, or changes data, and say how many records it touches. One approval covers a batch the user has seen.
• Never print API keys.