# Companies House API vs SEC EDGAR APIs (slim)

> Companies House scores 49.3 (D) to SEC EDGAR's 40.8 (E) for company data. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/companies-house-vs-sec-edgar.md (~1,950 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/companies-house-vs-sec-edgar.json · canonical https://www.anchorterminal.com/compare/companies-house-vs-sec-edgar
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Companies House API scores 49.3 (D) on agent readiness against SEC EDGAR APIs's 40.8 (E), and leads in 4 of 7 scored categories. SEC EDGAR APIs leads on security & auth and payments & pricing. Both do company data.

- Companies House API: D 49.3, rank #795 of 950 · https://www.anchorterminal.com/tools/companies-house.min.md
- SEC EDGAR APIs: E 40.8, rank #909 of 950 · https://www.anchorterminal.com/tools/sec-edgar.min.md
- Companies House API, good for UK company lookups, KYC, officer and PSC checks where the statutory source matters. Ahead on Schema & documentation, 60 against 23; Agent ergonomics, 67 against 41; Maintenance & community, 25 against 14; Transparency & trust, 69 against 57.
- SEC EDGAR APIs, good for Reading a US-listed company's filing history and its reported financial figures from the primary source, with free reuse. Ahead on Security & auth, 52 against 45; Payments & pricing, 60 against 40. Also No key needed to call it.

| Category | Companies House API | SEC EDGAR APIs |
| --- | --- | --- |
| Reliability (16%) | 38 | 38 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 60 | 23 |
| Agent ergonomics (13%) | 67 | 41 |
| Security & auth (14%) | 45 | 52 |
| Payments & pricing (10%) | 40 | 60 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 25 | 14 |
| Transparency & trust (7%) | 69 | 57 |

| Fact (where they differ) | Companies House API | SEC EDGAR APIs |
| --- | --- | --- |
| Vendor | Companies House | U.S. Securities and Exchange Commission |
| Hosted endpoint | `https://api.company-information.service.gov.uk` | `https://data.sec.gov` |
| Auth | API key | None |
| Licence | none | Public information. The SEC says information on sec.gov may be copied or further distributed without its permission, and asks for citation. EDGAR names and logos are registered trademarks |
| Last release | 2026-04-27 | none |
| Terms last updated | no date given | 2023-11-29 |
| Privacy policy last updated | no date given | 2023-11-29 |
| Terms restrict automated access | not found in the text | yes |
| Agent reviews | 4/5 (2) | none |