# Act! Web API **Canonical:** https://apis.io/apis/act/web-api/ **Provider:** Act! CRM — https://apis.io/providers/act/ **Base URL:** https://apimta.act.com/act.web.api **Documentation:** https://www.act.com/developer/ Act! Web API is published by [Act! CRM](https://apis.io/providers/act/) on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include CRM, REST API, OData, OpenAPI, and Webhook. The published artifact set on APIs.io includes API documentation, an API reference, an OpenAPI specification, and rate-limit docs. JSON-based REST API for the Act! CRM database exposing contacts, companies, groups, opportunities, tasks, activity series, calendar, notes, history, documents, attachments, users, teams, preferences, analytics and tenant-defined custom entities — 410 operations across 31 resource areas. Collection reads accept OData v4 query options; requests can be batched at POST /api/$batch; webhooks are registered through the API itself. The database schema is discoverable at runtime through the MetadataInfo operations because Act! databases are user-extensible. Authentication is a JWT bearer token obtained from GET /authorize with HTTP Basic credentials and an Act-Database-Name header. ## Machine-readable artifacts (44) - **Documentation** — https://www.act.com/developer/ - **APIReference** — https://apimta.act.com/act.web.api/ - **Swagger** — https://apimta.act.com/act.web.api/swagger/docs/v1 - **Admin Guide** — https://www.act.com/uploads/docs/en/webapi_admin_guide.pdf - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-activity-series-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-analytics-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-calendar-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-companies-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-configurations-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-contacts-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-cors-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-custom-entities-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-database-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-document-types-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-documents-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-geographics-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-groups-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-history-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-history-types-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-import-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-marketing-automations-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-metadata-info-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-notes-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-opportunities-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-preferences-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-products-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-secondary-contacts-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-supplemental-files-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-sync-data-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-system-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-task-types-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-tasks-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-teams-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-users-api-openapi.yml - **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/openapi/act-webhooks-api-openapi.yml - **Overlay** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/overlays/act-web-api-overlay.yaml - **Webhooks** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/asyncapi/act-webhooks.yml - **Conventions** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/conventions/act-conventions.yml - **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/errors/act-problem-types.yml - **RateLimits** — https://raw.githubusercontent.com/api-evangelist/act/refs/heads/main/rate-limits/act-rate-limits.yml - …and 4 more, listed in full on the page. ## Tags CRM, REST API, OData, OpenAPI, Webhook, Contact Management --- Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/act/web-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/act/.