# Substack Developer API

**Canonical:** https://apis.io/apis/substack/substack-developer-api/  
**Provider:** Substack — https://apis.io/providers/substack/  
**Base URL:** https://substack.com  
**Documentation:** https://support.substack.com/hc/en-us/articles/45099095296916-Substack-Developer-API

Substack Developer API is one of 3 APIs that [Substack](https://apis.io/providers/substack/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Profile, LinkedIn, Read Only, and Gated. The published artifact set on APIs.io includes API documentation, an API reference, and authentication docs.

Narrowly scoped official API that returns public Substack profile data for a given LinkedIn handle. Access requires accepting the Developer API Terms of Use, applying via form, and generating a token from the Developer API section of account settings. Only profiles meeting Substack's authenticity thresholds are returned.

## Machine-readable artifacts (5)

- **Documentation** — https://support.substack.com/hc/en-us/articles/45099095296916-Substack-Developer-API
- **APIReference** — https://support.substack.com/hc/en-us/articles/45099095296916-Substack-Developer-API
- **TermsOfService** — https://substack.com/api-tos
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/substack/refs/heads/main/authentication/substack-authentication.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/substack/refs/heads/main/apis.yml

## Other Substack APIs (2)

- [Substack MCP Server](https://apis.io/apis/substack/substack-mcp-server/)
- [Substack RSS Feeds](https://apis.io/apis/substack/substack-rss-feeds/)

## Tags

Profile, LinkedIn, Read Only, Gated

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