# LeadSonar

> LeadSonar is a B2B lead finder: describe who you want to reach and it finds those people and their work emails, with AI enrichment and a REST API. Searching is free; revealing, exporting and enrichment spend credits.

Key facts (verified 2026-10-06):
- Base URL https://app.leadsonar.io, endpoints under /api/v1/, auth header X-API-Key: ls_live_…
- Free: /leads/search (count), /leads/browse (masked). Paid: /leads/reveal 1 credit per NEW lead, /leads/exports 1 credit per delivered lead (max 50,000), /icp-score 1 credit.
- Set exactMatch: true with jobTitles (the API defaults to substring matching).
- Unknown filter values return 0, not an error. Data is US-focused. Revenue bands are derived from headcount.
- OpenAPI spec: https://docs.leadsonar.io/openapi.json

## Documentation Sets

- [Abridged documentation](https://docs.leadsonar.io/llms-small.txt): a compact version of the documentation for LeadSonar, with non-essential content removed
- [Complete documentation](https://docs.leadsonar.io/llms-full.txt): the full documentation for LeadSonar

## Notes

- The complete documentation includes all content from the official documentation
- The content is automatically generated from the same source as the official documentation