Posted by the APIs.io catalog. APIs.io does not own or sell this API; access comes from the provider, Act! CRM.
The Act! Web API is a JSON-based REST API for the Act! CRM database. It exposes contacts, companies, groups, opportunities, tasks, activity series, calendar, notes, history, documents, attachments, users, teams, preferences, analytics and tenant-defined custom entities across 410 operations in 31 resource areas. Collection reads accept OData v4 query options, requests can be batched at POST /api/$batch, and webhooks are registered through the API itself. The database schema can be discovered at runtime, since Act! databases are user-extensible. Authentication uses a JWT bearer token obtained from GET /authorize with HTTP Basic credentials and an Act-Database-Name header. It suits developers building integrations, sync tools and automations for small and mid-sized business sales teams. The API is deployed per database, so the base URL is per-tenant.
Published for it: Documentation, APIReference, Swagger, Admin Guide, OpenAPI, Overlay, Webhooks, Conventions, ErrorCatalog, RateLimits, DataModel, Sandbox, MCP server candidate, and APIs.json.
Kin Score: 74.3 (exemplar band). Agent Readiness: 25.7 (agent-aware band).
Pricing: set by the provider
Condition: a live hosted API listed in the APIs.io catalog.
Catalog listing: https://apis.io/apis/act/web-api/ Provider: https://www.act.com