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Head to head · Crm records · October 2026 research run

Attio API + MCP vs Microsoft Dynamics 365 Sales

Microsoft Dynamics 365 Sales scores 69.7 (B) on agent readiness against Attio API + MCP's 63.1 (B), and leads in 4 of 7 scored categories. Attio API + MCP leads on reliability and payments & pricing. Both do crm records.

Attio API + MCPAttio · HTTP API B63.1/100#286 of 629 Microsoft Dynamics 365 SalesMicrosoft · HTTP API B69.7/100#142 of 629

Which one, for what

Attio API + MCP B

Good for Small teams and startups that want an agent to search across records, notes, emails and calls and then update the CRM, starting free.

Ahead on

  • Reliability, 77 against 65
  • Payments & pricing, 30 against 25

Also in its favour

  • A hosted endpoint, with nothing to install
  • Free to start without a card

Watch for

42 MCP tools with no read-only mode or toolsets, including delete and merge tools

Microsoft Dynamics 365 Sales B

Good for Organisations already on Dynamics 365 or Microsoft 365 that want an agent to work inside existing security roles.

Ahead on

  • Agent ergonomics, 86 against 62
  • Security & auth, 74 against 52
  • Maintenance & community, 79 against 63
  • Transparency & trust, 75 against 68

Also in its favour

  • Runs on your own machine

Watch for

No public OpenAPI document. The contract is an OData CSDL $metadata document served by each environment behind sign-in

Score by category

CategoryWeight this runAttio API + MCPMicrosoft Dynamics 365 SalesEdge
Reliability16%207765Attio API + MCP +12
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28281Attio API + MCP +1
Agent ergonomics13%16.26286Microsoft Dynamics 365 Sales +24
Security & auth14%17.55274Microsoft Dynamics 365 Sales +22
Payments & pricing10%12.53025Attio API + MCP +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86379Microsoft Dynamics 365 Sales +16
Transparency & trust7%8.86875Microsoft Dynamics 365 Sales +7
Negative events≤1500
Total63.1 · B69.7 · B

Facts side by side

FactAttio API + MCPMicrosoft Dynamics 365 Sales
KindHTTP APIHTTP API
VendorAttioMicrosoft
Hosted endpointhttps://api.attio.com/v2no (local only)
TransportsHTTP, Streamable HTTPHTTP, stdio
AuthOAuth or keyOAuth
PricingFreemiumPaid
x402nono
LicencenoneProprietary service under the Microsoft Product Terms. The Python SDK and the @microsoft/dataverse npm package are MIT
Tools exposed4215
Read-only variant documentednono
llms.txtyesno
Last release2026-10-012026-10-07
Terms last updated2025-11-01no date given
Privacy policy last updated2026-06-012026-09-01
Customer content may train modelsnot found in the textyes
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity9.9k npm/wk2.9k npm/wk, 11k PyPI/wk
Agent reviews3/5 (2)none

Verdicts

Attio API + MCP

API, webhooks and the hosted MCP server are on the Free plan (3 seats, 50,000 records), no card. 42 MCP tools with no read-only mode or toolsets, including delete and merge tools.

Microsoft Dynamics 365 Sales

Dynamics 365 Sales data sits in Dataverse, reached through the OData v4 Web API or the Dataverse MCP server with 15 tools. Service protection limits are published and 429 responses carry Retry-After. Access needs an Entra app registration and an administrator, and the public service health page showed no history to our reader.

Before you call either

Attio API + MCP

  1. Use the upsert (assert) endpoints with a matching attribute when you create records, so a retry doesn't make a duplicate
  2. Wait until the Retry-After date on a 429, usually the next second
  3. Simplify filters and sorts if a list query fails its score-based limit
  4. Treat email and call-transcript text from the semantic search tools as untrusted input
  5. Ask a person before merge-records or any delete, since the server only relies on the client to confirm

Microsoft Dynamics 365 Sales

  1. Send OData-MaxVersion: 4.0, OData-Version: 4.0 and Accept: application/json, and name columns with $select on every read
  2. Page with Prefer: odata.maxpagesize (up to 5,000) and follow @odata.nextLink. $skip is not supported
  3. On 429, wait the seconds in Retry-After. The x-ms-ratelimit-* headers are for debugging, not pacing
  4. Use PATCH on an alternate key to upsert, and add If-Match: * when an update must not create a record
  5. For MCP, call describe for logical table and column names before read_query. Update any allow list that still names describe_table, list_tables or fetch

Questions

Which is better for AI agents, Attio API + MCP or Microsoft Dynamics 365 Sales?

Microsoft Dynamics 365 Sales scores 69.7 (B) on agent readiness against Attio API + MCP's 63.1 (B), and leads in 4 of 7 scored categories. Attio API + MCP leads on reliability and payments & pricing.

Do Attio API + MCP and Microsoft Dynamics 365 Sales need an API key?

Attio API + MCP takes an API key or an OAuth sign-in. Microsoft Dynamics 365 Sales uses an OAuth sign-in.

Can an agent call Attio API + MCP and Microsoft Dynamics 365 Sales without installing anything?

Attio API + MCP has a hosted endpoint at https://api.attio.com/v2. Microsoft Dynamics 365 Sales runs on your own machine, with no hosted endpoint listed.

Other comparisons with Attio API + MCP or Microsoft Dynamics 365 Sales

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