---
title: "Admin Substack Gap Fill"
method: POST
path: "/v1/admin/intake/substack-gap-fill"
---

# Admin Substack Gap Fill

`POST /v1/admin/intake/substack-gap-fill`

## Request

- Base URL: `https://api.storyflo.com` (the document declares no server; this is the origin it was published from)
- URL: `https://api.storyflo.com/v1/admin/intake/substack-gap-fill`
- Auth: none declared

LLM gap-fill via Anthropic Haiku 4.5 (B4 of the 5K-supply plan).
Asks the model, per vertical, to name big-subs Substack newsletters
we don't already track. Each suggestion is verified against the
public RSS feed before insertion so hallucinated slugs get filtered.

Budget guards: 50 Haiku calls/day (Upstash UTC bucket), 100 newly-
accepted sources per vertical. Both configurable via env.

## Headers

- `x-storyflo-email-token` string, nullable

## Response `200`

Successful Response

- object

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/storyflo/apis/storyflo-inference-router.md) · [All operations](https://skmtc.dev/storyflo/apis/storyflo-inference-router/llms.txt) · [OpenAPI document](https://skmtc.dev/storyflo/apis/storyflo-inference-router/revisions/c3a1a735ac7a?raw)