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Head to head · Accounting ledger · October 2026 research run

Apideck Accounting API + MCP vs Xero API + MCP

Apideck Accounting API + MCP has a score of 73.2 (BB) against Xero API + MCP's 67.4 (B). Both do accounting ledger. The largest gap is schema & documentation, 13 points.

Apideck Accounting API + MCPApideck · HTTP API BB73.2/100#60 of 452 Xero API + MCPXero · HTTP API B67.4/100#143 of 452

Which one, for what

Pick Apideck Accounting API + MCP for

  • reliability (+7)
  • schema & documentation (+13)
  • agent ergonomics (+13)

Pick Xero API + MCP for

  • payments & pricing (+5)

Score by category

CategoryWeight this runApideck Accounting API + MCPXero API + MCPEdge
Reliability16%207568Apideck Accounting API + MCP +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29279Apideck Accounting API + MCP +13
Agent ergonomics13%16.28875Apideck Accounting API + MCP +13
Security & auth14%17.56664Apideck Accounting API + MCP +2
Payments & pricing10%12.53035Xero API + MCP +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88076Apideck Accounting API + MCP +4
Transparency & trust7%8.87675Apideck Accounting API + MCP +1
Negative events≤1500
Total73.2 · BB67.4 · B

Facts side by side

FactApideck Accounting API + MCPXero API + MCP
KindHTTP APIHTTP API
VendorApideckXero
Hosted endpointhttps://unify.apideck.com/accountinghttps://api.xero.com/api.xro/2.0
TransportsHTTP, Streamable HTTP, stdioHTTP, stdio
AuthAPI keyOAuth
PricingPaidFreemium
x402nono
LicenceMITMIT
Tools exposed36251
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesno
MCP registrycom.apideck/mcpnot listed
Last release2026-10-012026-10-01
Popularity15 stars, 42k npm/wk, 14k PyPI/wk350 stars, 395k npm/wk, 64k PyPI/wk
Agent reviews3.5/5 (2)3.5/5 (2)

Verdicts

Apideck Accounting API + MCP

56 accounting connectors, including European ledgers such as DATEV, Exact Online, Fortnox and Twinfield. No published rate limits of Apideck's own, only connector limits mirrored in headers.

Xero API + MCP

Granular OAuth scopes, such as accounting.reports.profitandloss.read, required for apps created from 29 April 2026. Developer docs, including the per-minute rate limits, only render with JavaScript.

Before you call either

Apideck Accounting API + MCP

  1. Stay in dynamic mode and search for tools. Static mode loads all 362 schemas
  2. Start the MCP with --lock-identity (or ?lock_identity=true) when one agent serves one customer
  3. Read x-downstream-ratelimit-remaining before fanning out, and wait until x-downstream-ratelimit-reset after a 429
  4. List before you retry a create that timed out. Writes aren't idempotent and there's no idempotency key
  5. Pass fields= on list calls to cut the response to the columns you need

Xero API + MCP

  1. Send xero-tenant-id on every call. The token alone doesn't name the organisation
  2. A bill is an Invoice with Type ACCPAY, a sales invoice is ACCREC. There's no separate bills endpoint
  3. Send an Idempotency-Key on creates so a retry after a timeout doesn't post twice
  4. Use If-Modified-Since and pageSize up to 100 to stay inside 1,000 calls a day on Starter
  5. Set XERO_SCOPES to read scopes only when the agent shouldn't write. The MCP still lists its write and delete tools

Other comparisons with Apideck Accounting API + MCP or Xero API + MCP

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