# Copper Financial Custom Fields API

**Canonical:** https://apis.io/apis/copper-financial/copper-financial-custom-fields-api/  
**Provider:** Copper Financial — https://apis.io/providers/copper-financial/  
**Base URL:** https://api.copper.com/developer_api/v1  
**Documentation:** https://developer.copper.com/

Copper Financial Custom Fields API is one of 11 APIs that [Copper Financial](https://apis.io/providers/copper-financial/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 6 JSON Schema definitions. Tagged areas include Custom Fields. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

Custom field definitions and operations

## Operations (2)

| Method | Path | Summary |
|---|---|---|
| GET | `/custom_activity_types` | List all custom activity types |
| GET | `/custom_field_definitions` | List custom field definitions |

## Machine-readable artifacts (7)

- **OpenAPI** — https://artifacts.apis.io/copper-financial/openapi/copper-financial-custom-fields-api-openapi.yml
- **JSONSchema** — https://artifacts.apis.io/copper-financial/json-schema/copper-financial-person-schema.json
- **JSONSchema** — https://artifacts.apis.io/copper-financial/json-schema/copper-financial-lead-schema.json
- **JSONSchema** — https://artifacts.apis.io/copper-financial/json-schema/copper-financial-opportunity-schema.json
- **JSONSchema** — https://artifacts.apis.io/copper-financial/json-schema/copper-financial-company-schema.json
- **JSONSchema** — https://artifacts.apis.io/copper-financial/json-schema/copper-financial-task-schema.json
- **JSONSchema** — https://artifacts.apis.io/copper-financial/json-schema/copper-financial-activity-schema.json

## Other Copper Financial APIs (10)

- [Copper Financial Account API](https://apis.io/apis/copper-financial/copper-financial-account-api/)
- [Copper Financial Activities API](https://apis.io/apis/copper-financial/copper-financial-activities-api/)
- [Copper Financial Companies API](https://apis.io/apis/copper-financial/copper-financial-companies-api/)
- [Copper Financial Field Layouts API](https://apis.io/apis/copper-financial/copper-financial-field-layouts-api/)
- [Copper Financial Leads API](https://apis.io/apis/copper-financial/copper-financial-leads-api/)
- [Copper Financial Opportunities API](https://apis.io/apis/copper-financial/copper-financial-opportunities-api/)
- [Copper Financial People API](https://apis.io/apis/copper-financial/copper-financial-people-api/)
- [Copper Financial Related Items API](https://apis.io/apis/copper-financial/copper-financial-related-items-api/)
- [Copper Financial Tags API](https://apis.io/apis/copper-financial/copper-financial-tags-api/)
- [Copper Financial Tasks API](https://apis.io/apis/copper-financial/copper-financial-tasks-api/)

## Tags

Custom Fields

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/copper-financial/copper-financial-custom-fields-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/copper-financial/.