# Prism Audience Overlap API (https://www.socialcrawl.dev/platforms/prism/audience-overlap)

> Samples each creator's recent videos and their commenters, then computes a deterministic audience-overlap: shared commenters, Jaccard index, a/b-only counts, and an honesty `confidence` label (commenters over-index super-fans — a lower bound, never full-audience truth). TikTok-only in v1 (YouTube/Instagram are a fast-follow); a non-tiktok `platform` is rejected. If either creator can't be fetched the overlap is undefined → full refund.

TL;DR: `GET /v1/prism/audience-overlap` costs 20 credits per call and returns SocialCrawl's unified JSON schema. Single x-api-key auth, 100 free credits on signup.

## Parameters

| Parameter | Required | Description |
| --- | --- | --- |
| `handle_a` | yes | First TikTok creator handle. |
| `handle_b` | yes | Second TikTok creator handle. |
| `platform` | no | Platform (tiktok only in v1; default tiktok). |
| `videos_per_creator` | no | Recent videos sampled per creator (1–10, default 5) — caps the commenter pull. |
| `depth` | no | Set `deep` to widen the shared-fan enrichment sample. |

## Code example

```bash
curl "https://www.socialcrawl.dev/v1/prism/audience-overlap?handle_a=mkbhd&handle_b=mrwhosetheboss" \
  -H "x-api-key: sc_YOUR_API_KEY"
```

## FAQ

### What is the SocialCrawl Audience Overlap API (Prism Audience Overlap)?

GET /v1/prism/audience-overlap takes two TikTok handles (handle_a and handle_b) and measures how much their commenter audiences overlap. It returns a Jaccard index, the shared-fan count, and a confidence label, computed from each creator's real commenters rather than a follower estimate.

### How is the overlap computed?

The endpoint samples commenters from each creator's recent videos, intersects the two sets, and reports the Jaccard index (shared over combined) plus the raw shared-fan count. It is set math on real commenters, with no LLM in the calculation.

### What do videos_per_creator and depth control?

videos_per_creator sets how many recent videos to sample per handle, and depth sets how deep to pull commenters from each. Larger values widen the sample and raise the confidence label, at the cost of more work per call.

### How much does an audience-overlap call cost?

Each call is a flat 20 credits covering both creators' sampling and the overlap math. New accounts get 100 free credits with no credit card. If a strict majority of the legs fail, part of the cost is refunded automatically, and if all legs fail the full 20 credits come back.

### Why measure commenter overlap instead of follower counts?

Follower counts tell you reach, not whether two audiences are the same people. Commenter overlap shows the real engaged-audience intersection, so brands can spot redundant creator pairs or complementary ones before booking a collaboration. One call does the sampling and set math for you.

See the full Prism API: https://www.socialcrawl.dev/platforms/prism

## Pricing

- Standard endpoints: 1 credit per call
- Advanced endpoints: 5 credits per call
- Premium endpoints: 10 credits per call
- 100 free credits on signup, no credit card required. Cached responses cost 0 credits. Credit packs never expire.
- Full pricing: https://www.socialcrawl.dev/pricing

## Explore with AI

Questions this API answers, phrased for an AI assistant:

- How do I measure how much two TikTok creators' audiences overlap via API?
- What API computes a Jaccard overlap between two creators' commenters?
- creator audience overlap API for influencer collaborations