# Brex vs Mercury API (slim)

> Mercury API scores 63.8 (B) on agent readiness against Brex's 60.7 (C), and leads in 2 of 7 scored categories. Brex leads on schema & documentation. Both do spend transactions. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/brex-vs-mercury.md (~2,050 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/compare/brex-vs-mercury.json · canonical https://www.anchorterminal.com/compare/brex-vs-mercury
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Mercury API scores 63.8 (B) on agent readiness against Brex's 60.7 (C), and leads in 2 of 7 scored categories. Brex leads on schema & documentation. Both do spend transactions.

- Brex: C 60.7, rank #391 of 722 · https://www.anchorterminal.com/tools/brex.min.md
- Mercury API: B 63.8, rank #293 of 722 · https://www.anchorterminal.com/tools/mercury.min.md
- Brex, good for A finance team already on Brex that wants an agent to read expenses and transactions, issue and lock cards, set spend limits, upload receipts and pay vendors. Ahead on Schema & documentation, 80 against 72.
- Mercury API, good for A company that banks with Mercury and wants an agent to read balances and transactions, set notes and categories, upload receipts, issue virtual cards with spend limits and queue payments for human approval. Ahead on Security & auth, 82 against 72; Payments & pricing, 30 against 25. Also No incidents deducted, where Brex loses 3 points for them.

| Category | Brex | Mercury API |
| --- | --- | --- |
| Reliability (16%) | 60 | 59 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 80 | 72 |
| Agent ergonomics (13%) | 70 | 68 |
| Security & auth (14%) | 72 | 82 |
| Payments & pricing (10%) | 25 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 66 | 64 |
| Transparency & trust (7%) | 67 | 63 |

| Fact (where they differ) | Brex | Mercury API |
| --- | --- | --- |
| Vendor | Brex LLC | Mercury Technologies, Inc. |
| Hosted endpoint | `https://api.brex.com` | `https://api.mercury.com/api/v1` |
| Licence | Proprietary service under the Brex Platform Agreement and the Brex Access Agreement | Proprietary service under Mercury's Terms of Use. The Mercury CLI on GitHub is Apache-2.0 |
| Tools exposed | 43 | 35 |
| Last release | 2026-10-01 | 2026-08-12 |
| Terms restrict automated access | not found in the text | yes |