# Mercury API vs Spendesk API + MCP (slim)

> Mercury API scores 63.8 (B) on agent readiness against Spendesk API + MCP's 62.3 (B), and leads in 4 of 7 scored categories. Spendesk API + MCP leads on schema & documentation and transparency & trust. Both do spend transactions. Category scores, facts, verdicts and agent notes…

- Full: https://www.anchorterminal.com/compare/mercury-vs-spendesk.md (~2,200 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/mercury-vs-spendesk.json · canonical https://www.anchorterminal.com/compare/mercury-vs-spendesk
- 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 Spendesk API + MCP's 62.3 (B), and leads in 4 of 7 scored categories. Spendesk API + MCP leads on schema & documentation and transparency & trust. Both do spend transactions.

- Mercury API: B 63.8, rank #293 of 722 · https://www.anchorterminal.com/tools/mercury.min.md
- Spendesk API + MCP: B 62.3, rank #342 of 722 · https://www.anchorterminal.com/tools/spendesk.min.md
- 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 Agent ergonomics, 68 against 62; Payments & pricing, 30 against 0; Maintenance & community, 64 against 57.
- Spendesk API + MCP, good for A finance team already on Spendesk that wants an assistant to analyse spend, follow invoices and prepare the accounting close, or an ERP sync reading payables and settlements. Ahead on Schema & documentation, 87 against 72; Transparency & trust, 80 against 63.

| Category | Mercury API | Spendesk API + MCP |
| --- | --- | --- |
| Reliability (16%) | 59 | 55 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 72 | 87 |
| Agent ergonomics (13%) | 68 | 62 |
| Security & auth (14%) | 82 | 86 |
| Payments & pricing (10%) | 30 | 0 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 64 | 57 |
| Transparency & trust (7%) | 63 | 80 |

| Fact (where they differ) | Mercury API | Spendesk API + MCP |
| --- | --- | --- |
| Vendor | Mercury Technologies, Inc. | Spendesk SAS |
| Hosted endpoint | `https://api.mercury.com/api/v1` | `https://public-api.spendesk.com` |
| Pricing | Freemium | Paid |
| Licence | Proprietary service under Mercury's Terms of Use. The Mercury CLI on GitHub is Apache-2.0 | Proprietary service under Spendesk's terms and conditions and a separate Spendesk API agreement |
| Tools exposed | 35 | 62 |
| Read-only variant documented | yes | no |
| Last release | 2026-08-12 | 2026-09-29 |
| Terms last updated | no date given | couldn't be read |
| Privacy policy last updated | no date given | 2025-03-01 |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | yes | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | yes | couldn't be read |