Captain Data review

Captain Data is a hosted REST API for people and company data, not a library or self-hosted server. It sits between your application and the data-enrichment workflow: send a LinkedIn URL, name, query or domain to an endpoint, then use the returned structured profile in your product or downstream systems.

The API covers people enrichment, search and lookup; company enrichment, search and lookup; and employee retrieval for a company. That makes it a data service for B2B SaaS and AI-agent workflows that need profile and firmographic information without building those specific discovery and enrichment endpoints themselves. The homepage describes data as continuously refreshed and says the API serves product teams, GTM platforms and AI agents. Those are vendor claims, not an independent freshness assessment. Captain Data also presents a live API console and a curl quick start, so the integration model is direct HTTP requests rather than installing a client library.

The API uses the base URL https://api.captaindata.com/v1 and authenticates requests with an X-API-KEY header. The homepage shows GET requests, query parameters and a JSON response, with a curl example for enriching a person from a LinkedIn profile URL. It also links to documentation and provides an interactive console with sample endpoint responses.

The integration surface named by the vendor is the REST API. The homepage does not name language-specific SDKs, a CLI, webhooks or plugins; confirm SDK support in the vendor’s documentation before choosing a client stack. Endpoint credit costs are listed: enrichment costs one credit, find endpoints cost two, and search and employee lookup charge one credit per request plus one per result. The vendor defines one request as one page. Check the docs for response schemas, pagination parameters, error handling and retry behavior before wiring the API into a production pipeline.

The homepage offers 100 free credits with no credit card required. That is a trial allowance, not a recurring free plan. The pricing page lists Silver with 20,000 credits per month and up to 20,000 records, but it does not publish a USD price or an annual equivalent. A Silver estimate is shown billed monthly in EUR.

Growth uses credit-based pricing and includes priority support; Enterprise offers a named account manager, with a dedicated success manager above 500,000 credits per month. Titanium is volume-priced, with up to 96% off for annual billing. Prices for these plans are not published, so ask for a quote based on expected endpoint mix and monthly volume.

Credits accrue per operation: people and company enrichment cost one each, find operations cost two, and searches and employee retrieval cost one per request plus one per result. Search and employee calls can therefore consume credits as results grow. Database export is a custom-priced add-on. Confirm how credits are counted, whether unused credits roll over, and what happens when a project exceeds its allocation.

Captain Data is presented as a hosted API. The homepage does not identify an open-source repository or licence, so buyers should treat it as a proprietary service and ask the vendor about source availability and self-hosting before making either a requirement. The vendor lists database export as a custom-priced add-on; export formats, scope and frequency are not described on the homepage.

The API returns structured profile data, which can be consumed by your own application, but the vendor’s enrichment and search service remains a dependency. A migration would mean replacing those data operations and changing the integration, not moving a server you control. One Reddit thread about AppSumo licenses says the new enterprise platform was built on a new system and licenses could not transfer. That history makes it worth confirming contract terms, data export rights and service-continuity commitments directly with Captain Data.

The homepage lists a 99% uptime SLA, but it does not publish API rate limits, concurrency limits or endpoint-specific availability details. It also claims continuously refreshed data and describes responses as live; ask the vendor what freshness means for each data type and what happens when a profile cannot be found. Confirm retry guidance, pagination, timeout behavior and credit handling for failed requests before setting production budgets.

The homepage shows API-key authentication through the X-API-KEY header. It does not describe security certifications, data-retention controls or compliance coverage, so teams handling personal data should request those details and review applicable requirements. Reddit discussion raises a separate continuity issue: AppSumo users report that lifetime licenses were revoked or could not transfer to the new enterprise-level product. Those reports concern license continuity, not measured API reliability, but buyers should get current service and termination terms in writing.