# Apollo.io Fields API

**Canonical:** https://apis.io/apis/apollo-io/apollo-io-fields-api/  
**Provider:** Apollo.io — https://apis.io/providers/apollo-io/  
**Base URL:** https://api.apollo.io/api/v1  
**Documentation:** https://docs.apollo.io/reference/get-a-list-of-fields

Apollo.io Fields API is one of 14 APIs that [Apollo.io](https://apis.io/providers/apollo-io/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Custom Fields and Metadata. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

Field and custom-field definitions across contacts, accounts and opportunities. 4 operation(s) from the published Apollo OpenAPI.

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/apollo-io/refs/heads/main/openapi/apollo-io-fields-api-openapi.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/apollo-io/refs/heads/main/overlays/apollo-io-fields-overlay.yaml
- **Documentation** — https://docs.apollo.io/
- **APIReference** — https://docs.apollo.io/reference/get-a-list-of-fields

## Other Apollo.io APIs (12)

- [Apollo.io Enrichment API](https://apis.io/apis/apollo-io/apollo-io-enrichment-api/)
- [Apollo.io Search API](https://apis.io/apis/apollo-io/apollo-io-search-api/)
- [Apollo.io Accounts API](https://apis.io/apis/apollo-io/apollo-io-accounts-api/)
- [Apollo.io Contacts API](https://apis.io/apis/apollo-io/apollo-io-contacts-api/)
- [Apollo.io Deals API](https://apis.io/apis/apollo-io/apollo-io-deals-api/)
- [Apollo.io Sequences API](https://apis.io/apis/apollo-io/apollo-io-sequences-api/)
- [Apollo.io Emailer Messages API](https://apis.io/apis/apollo-io/apollo-io-emailer-messages-api/)
- [Apollo.io Tasks API](https://apis.io/apis/apollo-io/apollo-io-tasks-api/)
- [Apollo.io Calls API](https://apis.io/apis/apollo-io/apollo-io-calls-api/)
- [Apollo.io Conversations API](https://apis.io/apis/apollo-io/apollo-io-conversations-api/)
- [Apollo.io Analytics API](https://apis.io/apis/apollo-io/apollo-io-analytics-api/)
- [Apollo.io Miscellaneous API](https://apis.io/apis/apollo-io/apollo-io-miscellaneous-api/)

## Tags

Custom Fields, Metadata

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