# SEC API, free, GET /cusip/{cusip}: Cached company enrichment API

> The Mapping API resolves a ticker symbol, CIK, CUSIP or company name to a set of standardized company details.

SEC API's cached company enrichment API on its Free plan. It costs $0.00 per 1,000 companies. It returns 2 of the 13 key fields we check: Industry, Locations.
The cheapest of the 405 plans we rank by price is [Extruct, $49 monthly](https://datacircle.dev/cached-company-enrichment-apis/extruct/49-monthly/llms.txt). Extruct's cached company enrichment API costs nothing beyond the plan price.
[GetProspect](https://datacircle.dev/cached-company-enrichment-apis/getprospect/49-monthly-starter-post-v2-companies-enrich/llms.txt), [Hunter](https://datacircle.dev/cached-company-enrichment-apis/hunter/299-monthly/llms.txt) and [The Companies API](https://datacircle.dev/cached-company-enrichment-apis/the-companies-api/95-monthly-startup-get-v2-companies-domain/llms.txt) are the best cached company enrichment API providers in our benchmark.

- This page: https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-cusip-cusip
- [Best cached company enrichment API in 2026](https://datacircle.dev/best-cached-company-enrichment-api.txt)
- Get it: https://sec-api.io/pricing
- Request: `GET https://api.sec-api.io/mapping/cusip/{cusip}`
- API key: with the plan, on https://sec-api.io/pricing
- Its API docs: https://sec-api.io/docs/mapping-api/map-cusip-to-company-details
- Sold by: SEC API (https://sec-api.io)
- Checked: 2026-10-28

## In the answer

- Completeness: 15%
- Industry: ✓
- Locations: ✓

## Price

- $ per 1,000 companies: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: The Mapping API resolves a ticker symbol, CIK, CUSIP or company name to a set of standardized company details.

## Data

- Freshness: 1 day
- Keep data: no limit
- Use data: "Customers enrolled in the free \"Start\" Subscription may only use the Services for personal, non-commercial purposes and may not display or distribute Provider Data to third parties in any manner." "Customer will not, and will not allow third parties under its control to: (i) copy, modify, create a derivative work of, reverse engineer, decompile, translate, disassemble, or otherwise attempt to extract any or all of the source code of the Services [...], [...] (iii) resell or distribute any or all of the Services separately from any integrated Application, (iv) create multiple Applications or Accounts to simulate or act as a single Application or Account (respectively) or otherwise access the Services in a manner intended to avoid incurring Fees or exceed usage quotas [...]" "If Customer distributes Provider Data, Customer must state that the data was provided by Provider and provide a hyperlink to https://sec-api.io." "Customer may not publicly disclose, directly or through a third party, the results of any comparative or compatibility testing, benchmarking, or evaluation (each, a \"Test\") of the Services, unless the disclosure includes all information necessary for Provider or a third party to replicate the Test and includes the right to use the information necessary to replicate the Test. [...]" Pricing page, Usage: Personal & Startups "Personal. For startups: business internal.", Business Internal Use "Business internal only.", Enterprise & Institutions "Business internal + redistribution and reselling."

## Plan

- Pay: $0
- You get: 100 requests
- Enough for: 100 calls, once

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: cusip
- Method: GET
- Path: /cusip/{cusip}

## About the plan

- Plan: Free
- Who can get it: anyone, no credit card required

## The 17 fields the plan's answer can hold

name, ticker, CIK, CUSIP, exchange, delisted, security category, sector, industry, SIC code, SIC sector, SIC industry, Fama-French sector, Fama-French industry, currency, location, ID

## SEC API's plans (6)

- [SEC API, free, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-cusip-cusip/llms.txt): $0.00 per 1,000, 15% complete, 1 day
- [SEC API, $55 monthly, Personal & Startups, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/55-monthly-personal-startups-get-cusip-cusip/llms.txt): 15% complete, 1 day
- [SEC API, $239 monthly, Business Internal Use, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/239-monthly-business-internal-use-get-cusip-cusip/llms.txt): 15% complete, 1 day
- [SEC API, $588 yearly, Personal & Startups, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/588-yearly-personal-startups-get-cusip-cusip/llms.txt): 15% complete, 1 day
- [SEC API, $2,388 yearly, Business Internal Use, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/2388-yearly-business-internal-use-get-cusip-cusip/llms.txt): 15% complete, 1 day
- [SEC API, contact us, Enterprise & Institutions, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/contact-us-enterprise-institutions-get-cusip-cusip/llms.txt): 15% complete, 1 day

## SEC API's calls for this API (4)

- `GET /cik/{cik}`: [SEC API, free, GET /cik/{cik}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-cik-cik/llms.txt)
- `GET /name/{name}`: [SEC API, free, GET /name/{name}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-name-name/llms.txt)
- `GET /cusip/{cusip}`: [SEC API, free, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-cusip-cusip/llms.txt)
- `GET /ticker/{ticker}`: [SEC API, free, GET /ticker/{ticker}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-ticker-ticker/llms.txt)

## SEC API's APIs (5)

- [SEC API: cached company funding API pricing, 6 plans](https://datacircle.dev/cached-company-funding-apis/sec-api/free/llms.txt)
- [SEC API: cached company hierarchy API pricing, 4 plans](https://datacircle.dev/cached-company-hierarchy-apis/sec-api/free/llms.txt)
- [SEC API: cached leadership change API pricing, 6 plans](https://datacircle.dev/cached-leadership-change-apis/sec-api/free/llms.txt)
- [SEC API: cached company discovery API pricing, 6 plans, GET /exchange/{exchange}](https://datacircle.dev/cached-company-discovery-apis/sec-api/free-free-get-exchange-exchange/llms.txt)
- [SEC API: cached company discovery API pricing, 6 plans, GET /industry/{industry}](https://datacircle.dev/cached-company-discovery-apis/sec-api/free-free-get-industry-industry/llms.txt)
- [SEC API: cached company discovery API pricing, 6 plans, GET /sector/{sector}](https://datacircle.dev/cached-company-discovery-apis/sec-api/free-free-get-sector-sector/llms.txt)
- [SEC API: cached company enrichment API pricing, 6 plans, GET /cusip/{cusip}](https://datacircle.dev/cached-company-enrichment-apis/sec-api/free-free-get-cusip-cusip/llms.txt)

## SEC API: cached company enrichment API alternatives

- [JobsPipe, free, GET /v1/jobs/companies/{key}](https://datacircle.dev/cached-company-enrichment-apis/jobspipe/free/llms.txt): $0.00 per 1,000, 85% complete, 24 hours
- [Sumble, free, POST /v9/organizations, Organizations](https://datacircle.dev/cached-company-enrichment-apis/sumble/free/llms.txt): $0.00 per 1,000, 46% complete, 1 day
- [Implisense, free, GET /v2/companies/{id}](https://datacircle.dev/cached-company-enrichment-apis/implisense/free-free-get-v2-companies-id/llms.txt): $0.00 per 1,000, 62% complete, 1 day
- [Hirebase, free](https://datacircle.dev/cached-company-enrichment-apis/hirebase/free/llms.txt): $0.00 per 1,000, 69% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-28.

- https://sec-api.io
- https://sec-api.io/docs/mapping-api
- https://sec-api.io/docs/mapping-api/map-cusip-to-company-details
- https://sec-api.io/policies/terms-of-service
- https://sec-api.io/pricing