Fact Fence
FactFence detects hallucinations in LLM-generated text by verifying claims against source documents. Submit any AI response along with the original source text or URL, and get back a hallucination score, per-claim verdicts (supported, contradicted, not found), evidence citations with character offsets, and automatic corrections for contradicted claims. Built for regulated industries -- finance,…
1 subscribers
8.9/10 popularity
260 ms avg latency
71% success rate
5 endpoints
The in-depth APIMemo review for this API hasn't been published yet —
the data below comes straight from the public marketplace listing.
Fact Fence endpoints
| Method | Endpoint | Description |
|---|---|---|
| Health | ||
| GET |
healthCheck /v1/health |
Returns API status. No authentication required -- used by RapidAPI for uptime monitoring. |
| Verification | ||
| POST |
verifySingle /v1/verify |
Verify an LLM-generated response against a source document or URL. Available on all tiers (Basic+). - Provide source_text (raw text) or source_url (fetched automatically, 10 s… |
| POST |
verifyBatch /v1/batch/verify |
Verify up to 25 LLM responses in a single request. Pro+ tiers only -- Basic tier receives 403 Forbidden. | Tier | Max items | |---|---| | Pro | 10 | | Ultra | 25 | | Mega | 25 |… |
| Models | ||
| GET |
pricingHints /v1/pricing-hints |
Returns suggested pricing tiers and their limits. Useful for building tier-aware client logic. Available on all tiers (Basic+). |
| GET |
listModels /v1/models |
Returns all available verification engines and their capabilities. Available on all tiers (Basic+). |
Fact Fence pricing
| Plan | Price | Rate limit | Quotas |
|---|---|---|---|
| BASIC | Free | — |
|
| PRO | $29 / month | — |
|
| ULTRA | $149 / month | — |
|
| MEGA | $499 / month | — |
|
