Category · Domain data
Accounting and invoicing APIs for AI agents
APIs for bookkeeping and invoicing: ledgers, invoices, bills, expenses and reports, straight from the accounting software or through one API across many. Compared on the objects covered, write access, sandboxes, rate limits and price.
Capability keys accounting.ledger · accounting.invoices · accounting.bills · accounting.reports · accounting.unified · All tools
letme.dev/accounting.ledger picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 60 | Apideck Accounting API + MCPApideck · HTTP API | Accounting | BB | 73.2 | 3.5 (2) | n/a | n/a | $599 / mo | API key | Hosted + local | ||
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Unified accounting API for invoices, bills, payments, journal entries and financial reports across platforms including QuickBooks, Xero and NetSuite. Top strength 56 accounting connectors, including European ledgers such as DATEV, Exact Online, Fortnox and Twinfield Top weakness No published rate limits of Apideck's own, only connector limits mirrored in headers |
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| 100 | Merge Accounting APIMerge · HTTP API | Accounting | BB | 70.2 | 3.5 (2) | n/a | n/a | $650 / mo | API key | Hosted | ||
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Unified accounting API for invoices, payments, expenses, journal entries and financial statements across platforms including QuickBooks, Xero and NetSuite. Top strength 12 accounting platforms behind one set of common models, with writes Top weakness Launch jumps from free to $650 a month at the fourth linked account |
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| 143 | Xero API + MCPXero · HTTP API | Accounting | B | 67.4 | 3.5 (2) | n/a | n/a | Freemium | OAuth | Hosted + local | ||
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Accounting API for Xero organisations, with contacts, invoices, bills, payments, bank transactions, manual journals, the balance sheet, profit and loss and trial balance, plus payroll in some regions. Top strength Granular OAuth scopes, such as accounting.reports.profitandloss.read, required for apps created from 29 April 2026 Top weakness Developer docs, including the per-minute rate limits, only render with JavaScript |
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| 291 | FreeAgent APIFreeAgent · HTTP API | Accounting | C | 57.6 | 2.5 (2) | n/a | n/a | Your plan | OAuth | Hosted | ||
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REST API for FreeAgent, the UK small-business accounting product owned by NatWest Group. Top strength Published limits of 120 requests a minute and 3,600 an hour per user, with Retry-After on 429 Top weakness No OAuth scopes, so a token can do anything the authorising user can |
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| 311 | Rutter Accounting APIRutter · HTTP API | Accounting | C | 55.8 | 3.0 (2) | n/a | n/a | Paid | API key | Hosted | ||
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Unified API for accounting, commerce and payment platforms, aimed at lenders and financial software developers. Top strength Idempotency-Key header on writes, and prefer_sync writes that fall back to async after 30 seconds Top weakness Production prices are quote-only |
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| 342 | Invoice Ninja APIInvoice Ninja · HTTP API | Accounting | D | 52.4 | 2.5 (2) | n/a | n/a | $14 / mo | API key | Hosted | ||
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Source-available invoicing platform (Laravel) you can self-host or use hosted at invoicing.co. Top strength OpenAPI 3 spec with 379 operations and curl and PHP examples on each path Top weakness No general ledger, journals or balance sheet, so the bookkeeping half of the category test can't be done |
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| 369 | QuickBooks Online API + MCPIntuit · HTTP API | Accounting | D | 49.3 | 2.0 (2) | n/a | n/a | Your plan | OAuth | Hosted + local | ||
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Intuit's REST API for accessing QuickBooks Online accounting data. Top strength Official MCP server from Intuit with 145 tools and flags to remove write, update or delete tools Top weakness Rate limits, developer terms, partner tiers and deprecation rules are behind a JavaScript portal that returns nothing to a plain fetch |
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| 397 | FreshBooks APIFreshBooks · HTTP API | Accounting | E | 45.6 | 3.0 (2) | n/a | n/a | Your plan | OAuth | Hosted | ||
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REST API for FreshBooks, the invoicing-first accounting product for freelancers and small firms. Top strength OAuth scopes split read and write per resource, such as user:invoices:read Top weakness Rate limits have no numbers, status code or headers |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
Indexed, not reviewed (32)
Listings sorted into this category from public catalogues (the official MCP registry, APIs.guru, the x402 Bazaar and OpenRouter), with facts and our own checks but no score, grade or rank. How the index works.
| Listing | Kind | What it does | Why it's here |
|---|---|---|---|
| ai-netcafe ainetcafe.com | MCP server | Tables and ledgers checked by arithmetic, not by a model. 24 tools. MCP 2026-07-28 ready. | vendor's own |
| Attestwire attestwire.com | MCP server | EN 16931: validate invoice data, UBL/CII or PDF; emit XRechnung/Peppol XML, never a PDF. | vendor's own |
| basebalance.cloud — x402 RPC & MCP gateway basebalance.cloud | MCP server | USDC-gated Base JSON-RPC: free 10 req/min, $0.50 per 10k. Failover, cache, /mcp, ledger. | vendor's own, widely used |
| BeeL beel.es | MCP server | Spanish e-invoicing with VeriFactu (AEAT): issue invoices, manage customers, validate NIFs. | vendor's own |
| billingserv.com MCP server billingserv.com | MCP server | BillingServ MCP server for customers, invoices, orders, packages, licenses, and revenue reports. | vendor's own |
| burdenrateledger-tools burdenrateledger.com | MCP server | BurdenRateLedger: the monthly US search demand across the tools this product ships, read from... | vendor's own |
| businys.app MCP server businys.app | MCP server | 221 MCP tools across 26 practices for independent professionals. Clients, invoices, contracts. | vendor's own |
| cnb cz-agents.dev | MCP server | Official ČNB exchange rates — daily & historical CZK vs EUR, USD, 30+ currencies. For accounting. | vendor's own |
| Ekwo OS — open source accounting: ledger, invoices and VAT on your own Supabase or Postgres ekwo.ai | MCP server | Double-entry books an agent keeps as the user: invoices, VAT returns, 107 country packs. | vendor's own |
| Factuarea factuarea.com | MCP server | Spanish invoicing with VeriFactu (AEAT): invoices, quotes, contacts, products, taxes and filings. | vendor's own |
| Frihet ERP frihet.io | MCP server | AI-native ERP MCP: ES/EU fiscal compliance (VeriFactu/TicketBAI/Facturae), invoicing, tax, banking | vendor's own |
| gl-importer-mcp synder.com | MCP server | Import CSV/XLSX accounting data into QuickBooks Online or Xero via the Synder Importer API. | vendor's own |
| Holdings getholdings.com | MCP server | Let your AI send invoices and take payment — card or ACH. Free. | vendor's own |
| invoice yaktool.com | MCP server | Check invoice mandatory fields, validate a draft before issuing, and look up EN 16931 code lists. | vendor's own |
| invoicebox.ru MCP server invoicebox.ru | MCP server | MCP-сервер Инвойсбокса: счета, отгрузки и возвраты по просьбе человека | vendor's own |
| InvoiceXML invoicexml.com | MCP server | Create, validate, convert & extract compliant e-invoices (UBL, Factur-X, ZUGFeRD, XRechnung) | vendor's own |
| llm-bus llm-bus.com | MCP server | Coordinate multiple AI agents over MCP: atomic claims, leases, shared ledger, handoffs, tasks. | vendor's own |
| Mandare mandarelabs.com | MCP server | Verify an agent fleet's tamper-evident ledger, check budgets, kill a runaway agent. Local-first. | vendor's own |
| market sputnikx.xyz | MCP server | Sputnik X: EU trade 63M+, LV customs, salary, sanctions, EU AI Act, SoulLedger + x402 USDC. | vendor's own |
| Norman MCP Server norman.finance | MCP server | AI-powered bookkeeping and tax filing for entrepreneurs at the heart of the European economy. | vendor's own |
| parser parsedoc.wrapper-agency.com | MCP server | Parse receipts & invoices into structured JSON. Pay per call in USDC (x402 on Base), no API key. | vendor's own |
| Particles linkedparticles.org | MCP server | An append-only ledger of sourced, dated, confidence-scored claims your agent cites and you audit | vendor's own |
| pdfops-mcp pdfops.dev | MCP server | Deterministic PDF tools for AI agents: inspect fields, fill forms, merge PDFs, invoices. | vendor's own |
| PolyDoc polydoc.tech | MCP server | HTML/URL to PDF, screenshots, e-invoices. PDF/A and PDF/UA output with optional veraPDF verify. | vendor's own |
| Positif positif.ai | MCP server | The agent switchboard: identity, policy, loop-guard, and an append-only audit ledger. | vendor's own |
| TaskTime Pro tasktime.pro | MCP server | First-party local TaskTime Pro tools for tasks, timers, expenses, invoices, reports, and planning. | vendor's own |
| The Neural Ledger Intelligence theneuralledger.com | MCP server | Read-only global event and evidence intelligence with entities, assets, and impact paths. | vendor's own |
| Timbrix — CFDI 4.0 para México timbrix.mx | MCP server | Official Timbrix MCP server: stamp, cancel, and query Mexican CFDI 4.0 invoices from AI agents. | vendor's own |
| US compliance and books health medianfi.com | MCP server | US company filing obligations, plus a 25-check bookkeeping diagnostic. Sourced, dated, no signup. | vendor's own |
| wyrd-scribe wyrdmcp.com | MCP server | Creates new pages with provenance and records lineage in a ledger under .wyrd/. | vendor's own |
| x402receipts x402receipts.com | MCP server | Record x402 agent purchases as reconciled, auditable receipts; verify any receipt on the ledger. | vendor's own |
| yaktool yaktool.com | MCP server | 73 local deterministic tools: GTIN, feeds, CSV-XLSX, Digital Link QR, e-invoices. Rules cited. | vendor's own |
How we test this category
An agent creates a customer and an invoice, records a payment, reads a profit and loss report and posts a bill in a sandbox company. We check which steps work, the rate limits and how errors come back. This test hasn't run yet, so Task success is pending and the grades here come from the categories assessed from public evidence.
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
For companies
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