EVAL · HALLUCINATION CHECK

Check it before
you trust it.

A pay-per-call endpoint an agent can hit mid-loop: "verify this claim before I act on it or hand it downstream." Every verdict comes from a real model inference — or, in open mode, a real live search plus real inference over the results — run at request time. Never cached, never fabricated.

Interactive docs → Live catalog

"Open" mode checks consistency with live web evidence found right now — not objective truth. A claim can be well-supported by current web content and still be wrong. Read the full scope in the README before treating a verdict as more than that.

Running on Base Sepolia testnet — mainnet after validation

agent@caller:~$● LIVE

$ curl -X POST https://sanity.wickedapi.com/check -d '{"claim":"..."}'

402 · PAYMENT REQUIRED

scheme

exact

network

eip155:84532

asset

USDC

price

$0.001

retry

sign + X-PAYMENT header

METHODOLOGY

What a check actually measures

A small, isolated, swappable scoring module — not a black box. Grounded mode runs HHEM-2.1-Open (Apache-2.0, CPU inference) directly; open mode adds a real Tavily retrieval step first.

Grounded mode

Real entailment inference over (your context, the claim). A solved, scoreable problem: does the claim actually follow from what you supplied?

Open mode

Real live Tavily search, then the same entailment model over the retrieved evidence. Consistent with the web right now — not a guarantee of objective truth.

Honest, never forced

No findable or relevant evidence → insufficient_evidence, always. Never rounded to a confident verdict to look decisive.

ACCESS MODEL

Free with a key, paid per call otherwise

FREE

Send x-api-key for free, rate-limited access to POST /check and /check/batch — same free-tier model WickedAPI's main API uses.

$0.001

Per call for keyless callers — paid in USDC via x402 on Base Sepolia (testnet). No signup, agents pay as they go.

AUDIT

GET /checks/{id} retrieves a prior check's full result for dispute/audit, scoped to the caller who requested it.

FOR AGENTS & INTEGRATORS

Verify a claim in one call

Send a claim

Optionally with context. POST /check for one claim, POST /check/batch for several against shared context.

Get a real verdict

supported, unsupported, contradicted, or an honest insufficient_evidence — plus confidence and cited evidence.

Audit later

GET /checks/{id} pulls the full result back up for a dispute or a record.

Check a claim right now — free with an API key, or pay per call with x402:

curl -H "x-api-key: YOUR_KEY" -X POST https://sanity.wickedapi.com/check \
  -d '{"claim":"...","context":"...","mode":"grounded"}'

REFERENCE

Endpoints

Live, pulled straight from /v1/status — never out of sync with what's deployed.

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