> ## Documentation Index > Fetch the complete documentation index at: https://docs.intentleads.si/llms.txt > Use this file to discover all available pages before exploring further. # Leave out companies > Adds companies to leave out of every lane: current customers, competitors, partners. Ones already on the list are skipped. Send JSON `{"domains": [...], "linkedin": [...]}`, or a CSV (with a domain or company LinkedIn column) or a plain list, one per line. Websites are cleaned to the bare domain (`https://www.example.com/about` becomes `example.com`). Up to 100,000 companies. **How it works** - Every lane leaves these out: they're excluded from the audience before anything is bought, and anyone who still comes back (for example under another email) is dropped before they're written or counted against your plan. - Lane counts and "available now" leave them out from each lane's next check (daily, or queue one with `POST /api/v1/checks`). - People already exported stay in your leads; exclusions apply to future exports. **Free.** This doesn't use any contacts from your plan. ## OpenAPI ````yaml /api-reference/openapi.json post /api/v1/exclusions/companies openapi: 3.1.0 info: title: Intent Leads API version: '1.0' description: >- The Intent Leads API finds B2B people actively researching the topics you sell into, and exports them with contact details into your own tools. **Authentication.** Send an API key as a bearer token: `Authorization: Bearer il_live_…`. Keys belong to one organization. Standard keys work with everything except billing, team and key management, which need an admin key. **What costs contacts.** Only `POST /api/v1/exports` with `"dry_run": false` uses contacts from your plan. Quotes, counts, checks, samples and re-downloads are free. **Errors.** Every error is JSON: `{"error": "code", "message": "Plain-English explanation"}`. Codes are stable; messages may change. **Conventions.** JSON by default. Dates are `YYYY-MM-DD` and timestamps ISO 8601, all in UTC. Lane codes (`L1`) are case-insensitive. servers: - url: https://intentleads.si security: - bearerAuth: [] tags: - name: Exports description: Quote (free) and buy new people from your lanes, then download them. - name: Leads description: Pull and re-download the leads you've exported, and list deliveries. - name: Lanes description: >- Create, inspect and tune lanes: keywords plus the companies and roles you want. - name: Keywords description: Add and remove a lane's keywords; each one is approved as its own topic. - name: Checks description: >- Free lane checks that size every filter step over 14 days, plus quick topic signals. - name: Company list description: >- The target-company list your lanes can narrow to or use instead of industries. - name: Exclusions description: Companies and people left out of every lane, before anything is bought. - name: Suppressions description: People you exported who later asked to be removed. - name: Usage description: Contacts used and left this billing period. - name: Billing description: Plan, invoices and plan changes. Admin keys only. - name: Team description: Members and invite links. Admin keys only. - name: API keys description: Create, rename, rotate and revoke API keys. Admin keys only. - name: Account description: Check which organization a key belongs to, and rename it. - name: Reference description: Valid values for lane filters. - name: Activity description: A feed of changes and events in your organization. paths: /api/v1/exclusions/companies: post: tags: - Exclusions summary: Leave out companies description: >- Adds companies to leave out of every lane: current customers, competitors, partners. Ones already on the list are skipped. Send JSON `{"domains": [...], "linkedin": [...]}`, or a CSV (with a domain or company LinkedIn column) or a plain list, one per line. Websites are cleaned to the bare domain (`https://www.example.com/about` becomes `example.com`). Up to 100,000 companies. **How it works** - Every lane leaves these out: they're excluded from the audience before anything is bought, and anyone who still comes back (for example under another email) is dropped before they're written or counted against your plan. - Lane counts and "available now" leave them out from each lane's next check (daily, or queue one with `POST /api/v1/checks`). - People already exported stay in your leads; exclusions apply to future exports. **Free.** This doesn't use any contacts from your plan. operationId: addExcludedCompanies requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CompanyListJson' example: domains: - example.com - https://www.example.org/about linkedin: - https://www.linkedin.com/company/example-net text/csv: schema: type: string example: | domain example.com example.org text/plain: schema: type: string example: | example.com example.org responses: '200': description: The change, and the totals now. content: application/json: schema: $ref: '#/components/schemas/CompanyExclusionChange' example: changed: 2 dropped_invalid: 1 domains: 414 linkedin_pages: 3 updated_at: '2026-10-14T09:20:00.000Z' '400': description: Nothing valid, or too many. content: application/json: schema: $ref: '#/components/schemas/Error' examples: no_companies: value: error: no_companies message: No company domains or LinkedIn company URLs found. invalid_body: value: error: invalid_body message: Send JSON or CSV. too_many_exclusions: value: error: too_many_exclusions message: Up to 100,000 companies can be left out. '401': $ref: '#/components/responses/Unauthorized' '413': description: The CSV or text body is over 60 MB. content: application/json: schema: $ref: '#/components/schemas/Error' examples: too_large: value: error: too_large message: Up to 60 MB. Split bigger lists. '500': $ref: '#/components/responses/InternalError' components: schemas: CompanyListJson: type: object properties: domains: type: array items: type: string description: >- Company domains or website URLs, e.g. `example.com` or `https://www.example.com/about`. linkedin: type: array items: type: string description: >- Company LinkedIn URLs, e.g. `https://www.linkedin.com/company/example`. name: type: string description: A name for the list (default `API upload`). required: [] CompanyExclusionChange: type: object properties: changed: type: - integer - 'null' description: Companies added or removed by this call. dropped_invalid: type: - integer - 'null' description: Values that weren't a domain or company LinkedIn page. domains: type: - integer - 'null' description: Domains left out now. linkedin_pages: type: - integer - 'null' description: Company LinkedIn pages left out now. updated_at: type: - string - 'null' format: date-time cleared: type: - boolean - 'null' description: Present and true after `?all=true`. required: - changed - dropped_invalid - domains - linkedin_pages - updated_at Error: type: object properties: error: type: string example: lane_not_found description: Stable machine-readable code, e.g. `lane_not_found`. message: type: string example: No lane L9. description: Plain-English explanation you can show to a person. required: - error - message description: Every error has this shape. responses: Unauthorized: description: Missing, malformed, unknown or revoked API key. content: application/json: schema: $ref: '#/components/schemas/Error' examples: unauthorized: value: error: unauthorized message: 'Send a valid API key as: Authorization: Bearer il_live_…' InternalError: description: >- Unexpected server error. Safe to retry reads; retry an export only with the same `idempotency_key`. content: application/json: schema: $ref: '#/components/schemas/Error' examples: internal_error: value: error: internal_error message: Something went wrong. Try again. securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: il_live_… description: >- An Intent Leads API key, e.g. `il_live_` followed by 32 letters and digits. Create one on the API and CLI page of the dashboard. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.