Get an audit

Head to head · Accounting ledgers · October 2026 research run

Pennylane vs rotki MCP server

Pennylane scores 66.3 (B) on agent readiness against rotki MCP server's 45.6 (E), and leads in 6 of 7 scored categories. Both do accounting ledgers.

Best accounting and invoicing APIs for AI agents · All 77 accounting comparisons

PennylanePennylane SAS · HTTP API B66.3/100#298 of 954 rotki MCP serverRotki Solutions GmbH · Platform E45.6/100#865 of 954

Which one, for what

Pennylane B

Best for An agent working on the books of French companies or an accounting firm's client portfolio, with French chart of accounts, FEC export, Factur-X e-invoicing and VAT returns.

Ahead on

  • Reliability, 75 against 50
  • Schema & documentation, 85 against 76
  • Security & auth, 68 against 20
  • Payments & pricing, 20 against 10
  • Maintenance & community, 65 against 35
  • Transparency & trust, 76 against 48

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

The API agreement allows changes, suspension or revocation with or without notice and supplies the API as is

rotki MCP server E

Best for A Premium user who wants an assistant to answer questions about their own history, balances and cost basis on their own machine.

Also in its favour

  • Open source

Watch for

The desktop endpoint at http://127.0.0.1:4445/mcp takes no token, because the session key is forced empty outside Docker, so any local process can call it while the server runs

Score by category

CategoryWeight this runPennylanerotki MCP serverEdge
Reliability16%207550Pennylane +25
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28576Pennylane +9
Agent ergonomics13%16.26669rotki MCP server +3
Security & auth14%17.56820Pennylane +48
Payments & pricing10%12.52010Pennylane +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86535Pennylane +30
Transparency & trust7%8.87648Pennylane +28
Negative events≤1500
TotalB 66.3/100E 45.6/100

Facts side by side

FactPennylanerotki MCP server
KindHTTP APIPlatform
VendorPennylane SASRotki Solutions GmbH
Hosted endpointhttps://app.pennylane.com/api/external/v2no (local only)
TransportsHTTPHTTP
AuthOAuth or keyOAuth or key
PricingPaidPaid
x402nono
LicenceProprietary service under Pennylane's API agreement and customer termsAGPL-3.0
Tools exposed318
Read-only variant documentedyesyes
llms.txtyesyes
Last release2026-09-302026-10-02
Terms last updatedno date givenno document linked
Privacy policy last updatedno date given
Customer content may train modelsnot found in the text
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingyes
Terms or service can change without noticeyes
Arbitration or class-action waivernot found in the text

Verdicts

Pennylane

The v2 API has per-resource read and write scopes, an OpenAPI definition on every reference page, llms.txt and a breaking-change process that ran over 24 weeks. Access needs a paid Essentiel plan or partner approval, creation endpoints are not idempotent, and the API agreement lets Pennylane change or revoke the API without notice.

rotki MCP server

A read-only MCP server in the rotki desktop app, for Premium Basic at €25 a month and above. Privacy modes mask addresses and account names, but amounts, dates, assets and counterparties reach the connected assistant in every mode. The desktop endpoint takes no token, and the feature shipped in v1.44.0 on 21 August 2026.

Before you call either

Pennylane

  1. Call GET https://app.pennylane.com/api/external/v2/me first to confirm the token, user and company context
  2. Stay under 25 requests per 5 seconds per token and wait for the retry-after value on a 429
  3. Do not retry a create after a timeout without checking first. Only supplier invoice imports are deduplicated
  4. Send filter and sort again with every cursor. The cursor stores position only
  5. Send amounts as strings such as "120.00", and ask for :readonly scopes when the task only reads
  6. Use the MCP server for reads only. It cannot create, edit or delete, and firm connections need company_id

rotki MCP server

  1. Ask the person to start the server under Settings > MCP in the desktop app, since it stays down until started, then connect to http://127.0.0.1:4445/mcp
  2. Call info first. It works without Premium and reports whether an unlocked backend is connected
  3. Call get_event_taxonomy before any aggregate over event_type, and sum on direction or event_group, since informational rows double count MEV and block rewards
  4. Call refresh_analytics_data before query_sql, and check source.completeness and unpriced_rows before reporting any total
  5. Check the privacy mode before answering from the data. Strict keeps amounts and dates, and raw sends addresses, hashes and notes verbatim

Questions

Which is better for AI agents, Pennylane or rotki MCP server?

Pennylane scores 66.3 (B) on agent readiness against rotki MCP server's 45.6 (E), and leads in 6 of 7 scored categories.

Can an agent call Pennylane and rotki MCP server without installing anything?

Pennylane has a hosted endpoint at https://app.pennylane.com/api/external/v2. No hosted endpoint is listed for rotki MCP server.

Are Pennylane and rotki MCP server open source?

No open-source release is listed for Pennylane. rotki MCP server is open source (AGPL-3.0).

Other comparisons with Pennylane or rotki MCP server

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report