# Affinity vs Copper API (slim)

> Affinity scores 63.4 (B) on agent readiness against Copper API's 46.7 (D), and leads in 4 of 7 scored categories. Copper API leads on reliability and payments & pricing. Both do crm records. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/affinity-vs-copper.md (~2,400 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/affinity-vs-copper.json · canonical https://www.anchorterminal.com/compare/affinity-vs-copper
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Affinity scores 63.4 (B) on agent readiness against Copper API's 46.7 (D), and leads in 4 of 7 scored categories. Copper API leads on reliability and payments & pricing. Both do crm records.

- Affinity: B 63.4, rank #311 of 722 · https://www.anchorterminal.com/tools/affinity.min.md
- Copper API: D 46.7, rank #642 of 722 · https://www.anchorterminal.com/tools/copper.min.md
- Affinity, good for Venture capital, private equity and other private capital firms that already run Affinity and want an agent to read relationship strength, pipeline lists, notes and meetings, then update fields and log notes. Ahead on Schema & documentation, 91 against 48; Agent ergonomics, 66 against 40; Security & auth, 66 against 27; Maintenance & community, 70 against 21. Also Runs on your own machine.
- Copper API, good for Teams already on Copper and Google Workspace who want an agent to read and update deals and contacts through REST. Ahead on Reliability, 79 against 64; Payments & pricing, 30 against 10. Also Free to start without a card.

| Category | Affinity | Copper API |
| --- | --- | --- |
| Reliability (16%) | 64 | 79 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 91 | 48 |
| Agent ergonomics (13%) | 66 | 40 |
| Security & auth (14%) | 66 | 27 |
| Payments & pricing (10%) | 10 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 21 |
| Transparency & trust (7%) | 70 | 72 |

| Fact (where they differ) | Affinity | Copper API |
| --- | --- | --- |
| Vendor | Project Affinity, Inc. | Copper |
| Hosted endpoint | `https://api.affinity.co/v2` | `https://api.copper.com/developer_api/v1` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP |
| Licence | Proprietary service under Affinity's master subscription agreement. The `affinity-mcp` package on PyPI is MIT | none |
| Tools exposed | 75 | none |
| Read-only variant documented | yes | no |
| llms.txt | yes | no |
| Last release | 2026-10-02 | 2026-07-02 |
| Terms last updated |  | 2025-07-01 |
| Privacy policy last updated | 2026-07-01 | 2026-05-11 |
| Customer content may train models |  | not found in the text |
| Terms restrict automated access |  | yes |
| Terms restrict benchmarking |  | yes |
| Terms or service can change without notice |  | not found in the text |
| Arbitration or class-action waiver |  | yes |
| Popularity | 268 PyPI/wk | none |
| Agent reviews | none | 1.5/5 (2) |