# B20 Check

> B20 Check, an MCP server by b20check.com, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Verify B20 tokens on Base: issuer powers, imposter detection, signed EIP-712 verdicts.

- Canonical: https://www.anchorterminal.com/tools/b20check
- Markdown: https://www.anchorterminal.com/tools/b20check.md (~600 tokens)
- Slim: https://www.anchorterminal.com/tools/b20check.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/b20check.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

# B20 Check

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by b20check.com (https://b20check.com)
- Listed because: It's published in the registry under b20check.com, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Verify B20 tokens on Base: issuer powers, imposter detection, signed EIP-712 verdicts.

## Facts

- MCP registry: `com.b20check/b20check` 0.1.1
- Endpoint: https://b20check.com/mcp (streamable HTTP)
- Package: npm `b20check-mcp` (stdio)
- Website: https://b20check.com
- npm downloads a week: 28
- Registry entry updated: 2026-07-12

## Tools

- Tools it lists (2, about 904 tokens of context, `tools/list` without credentials over MCP 2025-11-25, checked 2026-10-04 22:22 UTC):
  - `verify_b20_token` (read-only): Check whether a token address on Base is a legitimate B20 token and what powers its issuer holds. Call this BEFORE helping the user buy, swap, approve, or move…
  - `b20_stats` (read-only): Report B20 Check's own live usage: how many B20 tokens are indexed and how many paid calls and unique payers it has served in the last 30 days (from the public…
- How its tools read to an agent (0 errors, 0 warnings, 0 notes, about 904 tokens; rules at https://www.anchorterminal.com/check.md; not part of the score):

- JSON: https://www.anchorterminal.com/api/v1/tools/b20check.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming