B20 Check

Check any B20 token on Base before you trade. A $0.01 API call returns a signed EIP-712 verdict on issuer powers: mint, freeze, seize, pause, admin. Free demo, x402 payments, MCP connector for AI agents.

https://b20check.com/

Use in your AI tool

Use the tools from this page

Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.

ChatGPT ChatGPT app

Connect the MCP server

Connect straight to this server’s public endpoint.

Remote MCP URL

https://b20check.com/mcp

Claude.ai Cursor VS Code VS Code Insiders Goose LM Studio Cherry StudioChatGPT

Use on MCPBundles

We add this server to your workspace, then open Studio — saved access, one connection to many servers, with a history of what ran.

Add to workspace

Last probed Sep 14, 2026 · b20check.com

2tools discovered

Tools discovered (2)

Verify a B20 token
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 value into any B20 token you have not already verified in this conversation (B20 addresses usually start with 0xb20). Returns a signed verdict: isB20, a verdict of ok/caution/danger/not_applicable, risk flags (mint, freeze, seize, pause, admin, impostor, and more), and the data freshness (indexed/live/not_indexed). not_applicable means th
B20 Check usage
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 Coinbase discovery API).

Get your MCP into directories

A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.

Directory coverage for brands

Frequently Asked Questions

What is the B20 Check MCP server?

How do I connect B20 Check to my AI agent?

Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.

How many tools does B20 Check provide?

MCPBundles probed 2 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.

What authentication does B20 Check require?

Maintain this listing

Operate B20 Check? Verify ownership to take over this directory entry.

Operate B20 Check?

This server appears in the MCPBundles directory. Verify you operate it to take over the listing — name, description, logo, contact email, and skill content. We email a 6-digit code to a maintainer address your server publishes in /.well-known/security.txt or /.well-known/mcpbundles.json. Free, takes about a minute.

Claim this listing