nobounce.dev — email validation that suggests the fix instead of just saying no.

Phase 0 is API-only; there is no marketing site yet.

  Docs (agent-first, copy-pasteable):  https://nobounce.dev/llms.txt
  OpenAPI spec:                        https://nobounce.dev/openapi.json
  Verdict taxonomy + fixtures:         https://nobounce.dev/v1/config
  MCP (JSON-RPC 2.0):                  POST https://nobounce.dev/mcp

Free sandbox key, no signup or captcha:
  curl -X POST https://nobounce.dev/v1/keys -H 'Content-Type: application/json' -d '{"tier":"sandbox"}'