Resolve a LinkedIn username to its entity id · LinkedIn API
Returns the entity id (`ACoAA…`) for a LinkedIn vanity username. Pass the id instead of the username to /linkedin/users/{username}/… routes to skip the lookup.
Using ChatGPT, Claude Code or another client? See the setup steps
curl https://api.unifapi.com/linkedin/resolve/user-id?username= \ -H "Authorization: Bearer $UNIFAPI_KEY"
Parameters
- usernamequeryrequired
- LinkedIn profile handle. Not an organization slug. A /in/{handle} URL is accepted.
- The parameter for this LinkedIn operation. Use the URL-visible slug or id described in the docs.
This operation is part of the LinkedIn API in the social platforms category. It uses the same Bearer token, request tracing, error model, and billing envelope as every UnifAPI endpoint, so agents can switch between platforms without custom per-vendor glue code.
Use it when a workflow needs LinkedIn public data alongside other social networks, but should still keep one API key, one account balance, and one predictable JSON contract.
Common agent workflows
- Resolve a public LinkedIn identity into structured profile metadata for enrichment agents.
- Refresh creator, company, or account snapshots without managing source-specific response shapes.
- Give an AI agent a stable LinkedIn data source without building a per-platform integration.
- Normalize LinkedIn responses into the same UnifAPI envelope used across the catalog.
Unified envelope, platform-native fields
- Lookup responses return one canonical object in `data` with stable identifiers, source URLs where available, and platform-specific metadata normalized into predictable JSON.
- The operation has a 9 credits ($0.009) minimum charge, so `billing.records_charged` can be higher than the visible records returned.
- A not-found or invalid-input condition uses the unified UnifAPI error shape, so callers do not need special handling for each source platform.
Response status codes
Billing
This operation charges 1 credit per billable record, with a 9 credits ($0.009) operation minimum. Public responses include billing metadata with credits charged, records charged, and remaining workspace balance. Incorrect Credit deductions caused by platform failures can be restored as billing corrections.
Errors and retries
Authentication, validation, rate-limit, not-found, and provider errors use the unified UnifAPI error format. Agents should log `request_id`, retry only retryable failures, and treat invalid API keys, disabled keys, and expired keys as the same public `unauthorized` error type.
Fields in the data object
A successful Resolve a LinkedIn username to its entity id call returns one data object with these fields.
- entity_idstring | null
- Resolved person entity ID when observed.
- usernamestring | null
- Resolved public LinkedIn handle when observed.
Agents & Skills built on LinkedIn
You rarely call Resolve a LinkedIn username to its entity id by hand. These prebuilt agents and skills already read LinkedIn data inside Claude or Codex — start from one of them, or call this endpoint yourself.
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More LinkedIn operations
Combine endpoints from the same platform, then join the results with other UnifAPI categories without changing authentication or response parsing.
Resolve a LinkedIn company slug to its id
Returns the numeric organization id for a LinkedIn company slug. Pass the id instead of the slug to /linkedin/companies/{slug}/… routes to skip the lookup.
Search LinkedIn companies
Searches LinkedIn companies by keyword with headcount, industry, location and hiring filters. Paginate with `cursor`.
Get a LinkedIn company profile by URL slug
Return a canonicalized LinkedIn company profile by its URL slug (`universal_name`, e.g. `microsoft`), including description, industry, size, headquarters, and the numeric `company_id` that related endpoints use. Useful as the entry point for any company-level research.
Get a LinkedIn user profile by URL slug
Returns the canonical LinkedIn profile for the given URL slug (`public_identifier`). Returns 404 not_found if no such user exists.
List a LinkedIn user's work experience
Returns a LinkedIn user's employment history: companies, titles, dates, locations and descriptions.
List a LinkedIn user's interests
Returns the companies, groups, schools, newsletters and top voices a LinkedIn user follows. Returns `not_found` when the user does not exist.