Name: grounded-answer-check
Price: 0.06 USDC
Availability: InStock

$ man grounded-answer-check

agentutility / compose / grounded-answer-check

PRICE / CALL

$0.06

USDC · base mainnet · scheme: exact

METHOD

POST

CLUSTER

compose

CATEGORY

uncategorized

STATUS

● live

NAME

grounded-answer-check — answer a question and grade how well the answer actually holds up against independent sources, in one call

SYNOPSIS

POST https://x402.agentutility.ai/grounded-answer-check
     Content-Type: application/json
     X-PAYMENT:    <signed-transferWithAuthorization>

     { ... }

↳ first call → 402 Payment Required. Sign USDCtransferWithAuthorization, retry with theX-PAYMENT header.

DESCRIPTION

Answer a question and grade how well the answer actually holds up against independent sources, in one call. Composite: one call runs answer-web + web-search + wikipedia-search + retrieval-rerank + citation-verify in parallel, then maps the answer's sentences onto reranked, re-verified evidence passages. Pass a question to get a generated, cited answer, or pass your own answer as context to grade it instead. Returns a support score, a supported/unsupported verdict, and the exact spans that had no backing evidence. Use it as a grounded answer API, hallucination check, RAG grounding evaluator, or source-backed QA layer before an agent trusts and repeats an answer.

INPUT — request schema

property	type	description	req?
question	string	The question to answer or to grade an answer against. Max 500 chars.	required
context	string	Optional pre-written answer to GRADE instead of generating a new one via answer-web. Max 4000 chars.	optional
strictness	string	How high the support score must be to mark the answer 'supported'. 'strict' requires stronger evidence coverage. Default 'lenient'. enum: lenient · strict	optional

OUTPUT — response shape

field	type	description
question	string	—
answer	string	—
generated	string	—
grounding	string	—
evidence	string	—
composed_of	string	—
components	string	—
degraded	string	—

EXAMPLES — two ways to call

EXAMPLE 1 · curl

curl -X POST https://x402.agentutility.ai/grounded-answer-check \
  -H 'Content-Type: application/json' \
  -d '{ }'

first response = 402 Payment Required with payment requirements; sign + retry with X-PAYMENT.

EXAMPLE 2 · mcp

# Install the MCP package for this endpoint's cluster
npx -y @agentutility/mcp-<cluster>

# Required: EVM private key with USDC on Base
export X402_PRIVATE_KEY=0x...

# Then call the grounded-answer-check tool from your MCP-aware agent.

MCP server handles payment automatically — your coding agent just calls the tool by name.

METADATA

tags: composegroundedanswercheckgrounded-answer-check
methods: POST
cluster: compose
price: $0.06 USDC per call

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