# Claim Verification

> Verify a claim across independent sources with a confidence verdict. Use before asserting any standalone factual claim.

- Skill: `samraddhashrivastavatech/claim-verification` (Agent Skill)
- Install (CLI): `npx skillmds@latest add samraddhashrivastavatech/claim-verification`
- Raw SKILL.md: https://api.skillmd.com/api/skills/samraddhashrivastavatech/claim-verification/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Research & Search
- Author: SAMRADDHASHRIVASTAVATECH (https://skillmd.com/u/samraddhashrivastavatech)
- Updated: 2026-09-22
- Page: https://skillmd.com/skills/samraddhashrivastavatech/claim-verification

---


# Claim verification

Test a claim against multiple independent sources and return a confidence
verdict.

## When to use

- A factual claim is about to be asserted or relied on.
- Weighing whether a source's statement is corroborated.
- Required as a gate inside `fact-checking` and `deep-research`.

## Tools used

- `verify_claim` — from a `claim`, optional `phrases` to verify against, and a
  `verification_threshold` (default 0.5).

## Workflow

1. Reduce the claim to its verifiable kernel.
2. `verify_claim` (supply `phrases` to aim the evidence hunt).
3. Look for *independent* confirmation, not echo chambers republishing one
   original.
4. Report the verdict + the evidence trail; flag uncertainty explicitly.

## Input schema

```json
{ "claim": "str", "phrases": "list[str]", "verification_threshold": "float" }
```

## Output schema

```json
{ "verdict": "string", "confidence": "number", "evidence": "list[{source,url,quote}]" }
```

## Security

Independence is the whole game: sources that copy each other do not
corroborate. Always surface the evidence, not just the verdict.

## Related skills

`evidence-extraction`, `fact-checking`, `contradiction-search`,
`web-search`, `source-analysis`