# FreeAgent API vs QuickBooks Online API + MCP (slim)

> FreeAgent API has a score of 57.6 (C) against QuickBooks Online API + MCP's 49.3 (D). Both do accounting ledger. The largest gap is reliability, 40 points. Category scores, facts, verdicts and agent notes side by side.

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- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-04

FreeAgent API has a score of 57.6 (C) against QuickBooks Online API + MCP's 49.3 (D). Both do accounting ledger. The largest gap is reliability, 40 points.

- FreeAgent API: C 57.6, rank #291 of 452 · https://www.anchorterminal.com/tools/freeagent.min.md
- QuickBooks Online API + MCP: D 49.3, rank #369 of 452 · https://www.anchorterminal.com/tools/quickbooks-online.min.md
- Pick FreeAgent API for reliability (+40), schema & documentation (+7), security & auth (+6), transparency & trust (+27). Pick QuickBooks Online API + MCP for agent ergonomics (+13), maintenance & community (+25).

| Category | FreeAgent API | QuickBooks Online API + MCP |
| --- | --- | --- |
| Reliability (16%) | 85 | 45 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 50 | 43 |
| Agent ergonomics (13%) | 55 | 68 |
| Security & auth (14%) | 44 | 38 |
| Payments & pricing (10%) | 30 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 60 | 85 |
| Transparency & trust (7%) | 78 | 51 |