# B20check

> Verify B20 tokens on Base: issuer powers, imposter detection, signed EIP-712 verdicts.

## Facts
- Page: https://tashan.sh/capability/pkg-b20check-mcp
- tashan id: pkg:b20check-mcp
- npm: https://www.npmjs.com/package/b20check-mcp
- Type: npm
- Category: finance
- tashan score: 42.0 / 100
- Adoption: 26.0
- Upkeep: 49.0
- Freshness: 79.0
- Evidence coverage: 100% of the inputs this score can use
- Health: active
- Instruction depth: not yet graded
- npm downloads: 76/week
- License: MIT
- Official: no

## Install

```sh
claude mcp add b20check -- npx -y b20check-mcp
```

## Security audit
- Known advisories: 0
- Install-time script: none declared
- Build provenance: not attested

Permissions are read from DECLARED dependencies only. Nothing is executed, so an empty result means "nothing declared", never "nothing possible".

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Measured 2026-09-13 by tashan (https://tashan.sh) from public evidence. Scorer s5.