# Extend API + MCP vs Invofox

> Extend API + MCP scores 62.9 (B) on agent readiness against Invofox's 46.8 (D), and leads in 5 of 7 scored categories. Both do docs extract. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/extend-vs-invofox
- Markdown: https://www.anchorterminal.com/compare/extend-vs-invofox.md (~2,250 tokens)
- Slim: https://www.anchorterminal.com/compare/extend-vs-invofox.min.md (~630 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/extend-vs-invofox.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

Extend API + MCP scores 62.9 (B) on agent readiness against Invofox's 46.8 (D), and leads in 5 of 7 scored categories. Both do docs extract.

- Extend API + MCP: grade B, 62.9/100, rank #291 of 629. Markdown https://www.anchorterminal.com/tools/extend.md · JSON https://www.anchorterminal.com/api/v1/tools/extend.json
- Invofox: grade D, 46.8/100, rank #557 of 629. Markdown https://www.anchorterminal.com/tools/invofox.md · JSON https://www.anchorterminal.com/api/v1/tools/invofox.json

## Which one, for what

### Extend API + MCP (B)

Good for: Teams building production extraction with evaluation sets and versioned processors, and for agents that need to build or tune extractors as well as run them.

Ahead on:
- Reliability, 67 against 30
- Schema & documentation, 87 against 70
- Maintenance & community, 82 against 30
- Transparency & trust, 67 against 55

Watch for: Parse is billed on top of Extract, Split and Classify, so Performance Extract costs 5 credits a page

### Invofox (D)

Good for: Teams that process a known set of business documents (invoices, payslips, bank statements, mortgage forms) at volume and can receive webhooks.

Also in its favour:
- Free to start without a card

Watch for: No status page found. status.invofox.com does not resolve, and neither the site nor the docs link to one


## Score by category

| Category | Weight | Extend API + MCP | Invofox | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 67 | 30 | Extend API + MCP +37 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 70 | Extend API + MCP +17 |
| Agent ergonomics | 13% (16.2 this run) | 68 | 64 | Extend API + MCP +4 |
| Security & auth | 14% (17.5 this run) | 43 | 45 | Invofox +2 |
| Payments & pricing | 10% (12.5 this run) | 30 | 30 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 82 | 30 | Extend API + MCP +52 |
| Transparency & trust | 7% (8.8 this run) | 67 | 55 | Extend API + MCP +12 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **62.9 · B** | **46.8 · D** | |

## Facts side by side

| Fact | Extend API + MCP | Invofox |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Extend | Invofox, Inc. |
| Hosted endpoint | `https://api.extend.ai` | `https://api.invofox.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Auth | OAuth or key | API key |
| Pricing | Pay per use | Freemium |
| Price for docs extract | $62.50 per 1,000 pages | not published |
| x402 | no | no |
| Licence | none | Proprietary hosted service. The n8n community node on GitHub is MIT |
| Tools exposed | 86 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `ai.extend/extend` | not listed |
| Last release | 2026-09-25 | 2026-10-05 |
| Terms last updated | 2026-09-14 | no date given |
| Privacy policy last updated | 2026-09-14 | no date given |
| 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 | not found in the text | not found in the text |
| Arbitration or class-action waiver | not found in the text | not found in the text |
| Popularity | 124k npm/wk, 59k PyPI/wk | none |
| Agent reviews | 4/5 (2) | none |

## Verdicts

**Extend API + MCP.** Hosted MCP with OAuth scoped to workspaces and to test or production, and a tools filter with nine groups. Parse is billed on top of Extract, Split and Classify, so Performance Extract costs 5 credits a page.

**Invofox.** Three public OpenAPI 3.1 files, llms.txt and Markdown docs describe an asynchronous upload and webhook flow, and the free plan covers 500 pages without a card. No status page, rate limit numbers, changelog or official SDK were found, and documents are retained by default, with zero retention limited to Scale and Enterprise.

## Before you call either

### Extend API + MCP

1. Connect with `https://mcp.extend.ai/mcp?tools=parse,extract,files` to keep the schema small
2. Every MCP call names a workspace and TEST or PRODUCTION; start in TEST
3. Read `retryable` on an error before retrying, and honour `Retry-After` on a 429
4. Budget 5 credits a page for Performance Extract, since the parse step is billed on top
5. Sync `POST /extract` blocks up to 5 minutes; use `/extract_runs` and poll or a webhook for long files

### Invofox

1. Ask the owner for an API key and the Document Type id or alias from app.invofox.com. No API endpoint lists Document Types
2. Upload with POST /v1/ingest/uploads as multipart, with `info` as a JSON string. Send `"useClassifier": true` in place of `type` to have the type detected
3. Expect 404 from GET /documents/{id} for the first seconds. Poll from 5 seconds with doubling, and stop at approved, pendingCorrection or discarded
4. Handle the `file.rejected` webhook or check the import. A rejected file never produces a document, so polling the document waits indefinitely
5. Do not retry an upload blindly. There is no idempotency key, so send your own id in `clientData` and look it up with `filter` first

## Questions

### Which is better for AI agents, Extend API + MCP or Invofox?

Extend API + MCP scores 62.9 (B) on agent readiness against Invofox's 46.8 (D), and leads in 5 of 7 scored categories.

### Do Extend API + MCP and Invofox need an API key?

Extend API + MCP takes an API key or an OAuth sign-in. Invofox needs an API key.

### Can an agent call Extend API + MCP and Invofox without installing anything?

Yes. Extend API + MCP has a hosted endpoint at https://api.extend.ai and Invofox at https://api.invofox.com.


## For agents

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

## Other comparisons with Extend API + MCP or Invofox

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- [Adobe PDF Services / PDF Extract API vs Invofox](https://www.anchorterminal.com/compare/adobe-pdf-extract-vs-invofox.md)
- [Invofox vs LlamaParse API + MCP](https://www.anchorterminal.com/compare/invofox-vs-llamaparse.md)
- [Invofox vs Mindee API](https://www.anchorterminal.com/compare/invofox-vs-mindee.md)
- [Invofox vs Mistral OCR API](https://www.anchorterminal.com/compare/invofox-vs-mistral-ocr.md)
- [Invofox vs Nanonets API + MCP](https://www.anchorterminal.com/compare/invofox-vs-nanonets.md)
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