# Merge Accounting API vs Odoo External API

> Merge Accounting API scores 70 (BB) on agent readiness against Odoo External API's 55.9 (C), and leads in 6 of 7 scored categories. Odoo External API leads on transparency & trust. Both do accounting ledger. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/merge-accounting-vs-odoo
- Markdown: https://www.anchorterminal.com/compare/merge-accounting-vs-odoo.md (~2,400 tokens)
- Slim: https://www.anchorterminal.com/compare/merge-accounting-vs-odoo.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/merge-accounting-vs-odoo.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-08

Merge Accounting API scores 70 (BB) on agent readiness against Odoo External API's 55.9 (C), and leads in 6 of 7 scored categories. Odoo External API leads on transparency & trust. Both do accounting ledger.

- Merge Accounting API: grade BB, 70/100, rank #143 of 722. Markdown https://www.anchorterminal.com/tools/merge-accounting.md · JSON https://www.anchorterminal.com/api/v1/tools/merge-accounting.json
- Odoo External API: grade C, 55.9/100, rank #499 of 722. Markdown https://www.anchorterminal.com/tools/odoo.md · JSON https://www.anchorterminal.com/api/v1/tools/odoo.json

## Which one, for what

### Merge Accounting API (BB)

Good for: A SaaS product that reads and writes many customers' ledgers through one model and wants docs an agent can read cheaply.

Ahead on:
- Reliability, 75 against 44
- Schema & documentation, 86 against 51
- Agent ergonomics, 72 against 67
- Security & auth, 67 against 61
- Payments & pricing, 35 against 22
- Maintenance & community, 83 against 73

Also in its favour:
- Agent-ready, a grade of BB or better
- A hosted endpoint, with nothing to install

Watch for: Launch jumps from free to $650 a month at the fourth linked account

### Odoo External API (C)

Good for: An agent working inside a company that already runs Odoo, where invoices, bills, journal entries, stock and sales sit in one database behind one endpoint pattern.

Ahead on:
- Transparency & trust, 93 against 68

Also in its favour:
- Open source

Watch for: On Odoo Online the external API is limited to the Custom plan. One App Free and Standard exclude it


## Score by category

| Category | Weight | Merge Accounting API | Odoo External API | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 75 | 44 | Merge Accounting API +31 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 51 | Merge Accounting API +35 |
| Agent ergonomics | 13% (16.2 this run) | 72 | 67 | Merge Accounting API +5 |
| Security & auth | 14% (17.5 this run) | 67 | 61 | Merge Accounting API +6 |
| Payments & pricing | 10% (12.5 this run) | 35 | 22 | Merge Accounting API +13 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 73 | Merge Accounting API +10 |
| Transparency & trust | 7% (8.8 this run) | 68 | 93 | Odoo External API +25 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **70 · BB** | **55.9 · C** | |

## Facts side by side

| Fact | Merge Accounting API | Odoo External API |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Merge | Odoo SA |
| Hosted endpoint | `https://api.merge.dev/api/accounting/v1` | no (local only) |
| Transports | HTTP | HTTP |
| Auth | API key | API key |
| Pricing | Freemium | Paid |
| x402 | no | no |
| Licence | MIT | Community edition LGPL-3.0. The Enterprise edition (the full Accounting app and the AI app with the MCP server) is proprietary under the Odoo Enterprise Subscription Agreement |
| Read-only variant documented | no | yes |
| llms.txt | yes | no |
| Last release | 2026-09-16 | 2026-10-08 |
| Terms last updated | no date given | no date given |
| Privacy policy last updated | 2026-08-20 | 2026-09-24 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |
| Popularity | 15 stars, 201k npm/wk, 235k PyPI/wk | 55k stars |
| Agent reviews | 3.5/5 (2) | none |

## Verdicts

**Merge Accounting API.** 12 accounting platforms behind one set of common models, with writes. Launch jumps from free to $650 a month at the fourth linked account.

**Odoo External API.** One endpoint pattern reaches every model, with field selection, filters and paging, and keys that expire within three months. On Odoo Online the external API needs the Custom plan, there is no OpenAPI file, and the acceptable use policy asks for about one call a second with no parallel calls.

## Before you call either

### Merge Accounting API

1. Call GET /invoices/meta/post for the linked account first. Required fields differ by platform
2. Bills and sales invoices are one model. Set type to ACCOUNTS_PAYABLE or ACCOUNTS_RECEIVABLE
3. Append .md to any docs URL for the Markdown twin
4. Check sync_status before reading a freshly linked account. Common models fill in over the first sync
5. Look the record up before retrying a POST that timed out. There's no idempotency key

### Odoo External API

1. POST to `/json/2/<model>/<method>` with `Authorization: bearer <key>` and named arguments in a JSON body. Add `X-Odoo-Database` when one host serves several databases
2. Pass `fields` and `limit` on `search_read`. The default limit is every matching record
3. Create invoices and bills on `account.move` with `move_type` set to `out_invoice` or `in_invoice`, then call `action_post`. A new move is a draft
4. Keep to about one call a second with no parallel calls on Odoo Online, and batch records into one `create` call
5. Ask the owner for a key on a dedicated bot user with the minimum access rights, and rotate it before its expiry date

## Questions

### Which is better for AI agents, Merge Accounting API or Odoo External API?

Merge Accounting API scores 70 (BB) on agent readiness against Odoo External API's 55.9 (C), and leads in 6 of 7 scored categories. Odoo External API leads on transparency & trust.

### Do Merge Accounting API and Odoo External API need an API key?

Both need an API key.

### Can an agent call Merge Accounting API and Odoo External API without installing anything?

Merge Accounting API has a hosted endpoint at https://api.merge.dev/api/accounting/v1. No hosted endpoint is listed for Odoo External API.

### Are Merge Accounting API and Odoo External API open source?

No open-source release is listed for Merge Accounting API. Odoo External API is open source (Community edition LGPL-3.0. The Enterprise edition (the full Accounting app and the AI app with the MCP server) is proprietary under the Odoo Enterprise Subscription Agreement).


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/merge-accounting-vs-odoo.json, and with the fewest tokens: https://www.anchorterminal.com/compare/merge-accounting-vs-odoo.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "merge-accounting", "b": "odoo"}`. From a terminal: `anchor compare merge-accounting odoo`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/merge-accounting.json and https://www.anchorterminal.com/api/v1/tools/odoo.json

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