# Finch vs Paychex

> Finch scores 71.6 (BB) on agent readiness against Paychex's 44.8 (E), and leads in every scored category. Both do payroll employees. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/finch-vs-paychex
- Markdown: https://www.anchorterminal.com/compare/finch-vs-paychex.md (~2,200 tokens)
- Slim: https://www.anchorterminal.com/compare/finch-vs-paychex.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/finch-vs-paychex.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

Finch scores 71.6 (BB) on agent readiness against Paychex's 44.8 (E), and leads in every scored category. Both do payroll employees.

- Finch: grade BB, 71.6/100, rank #104 of 722. Markdown https://www.anchorterminal.com/tools/finch.md · JSON https://www.anchorterminal.com/api/v1/tools/finch.json
- Paychex: grade E, 44.8/100, rank #666 of 722. Markdown https://www.anchorterminal.com/tools/paychex.md · JSON https://www.anchorterminal.com/api/v1/tools/paychex.json

## Which one, for what

### Finch (BB)

Good for: An application that needs to read employees, pay runs and pay statements from whatever payroll or HR system an employer already uses, or to write benefit deductions back.

Ahead on:
- Reliability, 84 against 41
- Schema & documentation, 87 against 66
- Agent ergonomics, 71 against 54
- Security & auth, 66 against 58
- Payments & pricing, 30 against 0
- Maintenance & community, 84 against 26
- Transparency & trust, 74 against 54

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

Watch for: Finch cannot create, preview or approve a payroll. Writes are limited to deductions and contributions, on Pro and Premier plans

### Paychex (E)

Good for: A software partner with shared customers on Paychex Flex that needs to sync workers, pay rates, direct deposits and tax setup, or to send hours and earnings into pay entry.

Watch for: Partner access needs a questionnaire, review by the Corporate Partnerships Team, a demo and final approval. The sandbox is issued only after approval


## Score by category

| Category | Weight | Finch | Paychex | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 84 | 41 | Finch +43 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 87 | 66 | Finch +21 |
| Agent ergonomics | 13% (16.2 this run) | 71 | 54 | Finch +17 |
| Security & auth | 14% (17.5 this run) | 66 | 58 | Finch +8 |
| Payments & pricing | 10% (12.5 this run) | 30 | 0 | Finch +30 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 84 | 26 | Finch +58 |
| Transparency & trust | 7% (8.8 this run) | 74 | 54 | Finch +20 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **71.6 · BB** | **44.8 · E** | |

## Facts side by side

| Fact | Finch | Paychex |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Profound Platform Inc. (dba Finch) | Paychex, Inc. |
| Hosted endpoint | `https://api.tryfinch.com` | no (local only) |
| Transports | HTTP, stdio | HTTP |
| Auth | OAuth | OAuth |
| Pricing | Paid | Paid |
| x402 | no | no |
| Licence | Proprietary service under Finch's Master Service Agreement. The SDKs and the MCP server on GitHub are Apache-2.0 | Proprietary service. Public use is under the Paychex User Terms of Use. Partner terms aren't published |
| Tools exposed | 2 | none |
| Read-only variant documented | no | no |
| llms.txt | yes | no |
| Last release | 2026-10-05 | 2026-08-20 |
| Terms last updated | 2026-08-07 | no date given |
| Privacy policy last updated | no date given | 2026-06-01 |
| Customer content may train models | not found in the text | yes |
| Terms restrict automated access | not found in the text | yes |
| Terms restrict benchmarking | yes | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | 16k npm/wk, 26k PyPI/wk | none |

## Verdicts

**Finch.** Graded on the REST API. An employer grants each connection named product permissions, and limits, error codes and a 99.9 per cent uptime SLA are published. Finch reads payroll and writes deductions but cannot run a payroll. Access tokens never expire, no idempotency keys were found, and writes and most providers need a sales-led plan.

**Paychex.** A public OpenAPI 3.0.3 definition covers 110 operations, and payroll entries stay unprocessed until a person submits the payroll in Flex. Partner credentials and the sandbox follow approval by Paychex, no price is published, and no status page, SLA or SDK was found in the reviewed pages.

## Before you call either

### Finch

1. Send `Finch-API-Version: 2020-09-17` and `Authorization: Bearer <access_token>` on every request. A request without the version header fails with 400
2. Call GET /introspect first to see the connection's products, status and whether it is automated or assisted before choosing endpoints
3. Treat a 202 response as data not ready, not as data. Retry with backoff, and expect up to 14 days for an assisted connection's first sync
4. Stay under 20 requests a minute on organisation endpoints and 12 on pay endpoints across all tokens. Batch IDs, and on 429 wait 60 seconds
5. After a deduction write, poll the job by `job_id` until it completes before enrolling individuals. Enrolment overwrites an existing enrolment
6. Start the MCP server with `--code-allow-http-gets` or a token without the benefits product when only reads are intended

### Paychex

1. POST `grant_type=client_credentials` with the key and secret in the form body to `/auth/oauth/v2/token`. Tokens last 60 minutes and there is no refresh token, so request a new one
2. Call GET `/companies` first. Worker and payroll paths need a `companyId` or `workerId` the app has been granted
3. Send `offset` and `limit` on GET `/companies/{companyId}/workers`, 50 at most, and resend the `ETag` between pages. The unpaged form is withdrawn on 24 February 2027
4. Creating a check doesn't pay anyone. A person must review and submit the payroll in Paychex Flex
5. Send a unique `X-payx-client-correlationId` per request and keep the `x-payx-txid` from the response. Support asks for it
6. On 423 the client is locked by another user or process. Wait and retry

## Questions

### Which is better for AI agents, Finch or Paychex?

Finch scores 71.6 (BB) on agent readiness against Paychex's 44.8 (E), and leads in every scored category.

### Do Finch and Paychex need an API key?

Both use an OAuth sign-in.

### Can an agent call Finch and Paychex without installing anything?

Finch has a hosted endpoint at https://api.tryfinch.com. No hosted endpoint is listed for Paychex.


## For agents

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

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