Aval MCP MCP server

Aval provides payment-backed trust scores for AI agents on the Base blockchain. The MCP server allows agents to verify vendor reputation by checking if reviews are backed by real USDC payments, helping prevent fraud from Sybil accounts. It offers tools to check individual agent trust scores and view reputation overviews, integrating seamlessly with x402 payment protocols.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Aval

MCP endpoint (Streamable HTTP)

https://aval.srv1024618.hstgr.cloud/mcp

Vendor documentation

What you can do with it

Check vendor trust score before payment
Verify if reviews are backed by real payments
View agent reputation overview
Block payments to risky vendors

Tools advertised by the last live check:

check_agent_trust
reputation_overview

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http aval-mcp https://aval.srv1024618.hstgr.cloud/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add aval-mcp --url https://aval.srv1024618.hstgr.cloud/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable aval-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "aval-mcp": {
      "url": "https://aval.srv1024618.hstgr.cloud/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "aval-mcp": {
      "type": "streamableHttp",
      "url": "https://aval.srv1024618.hstgr.cloud/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start aval-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "aval-mcp": {
      "type": "http",
      "url": "https://aval.srv1024618.hstgr.cloud/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http aval-mcp https://aval.srv1024618.hstgr.cloud/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "aval-mcp": {
      "url": "https://aval.srv1024618.hstgr.cloud/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "aval-mcp": {
      "serverUrl": "https://aval.srv1024618.hstgr.cloud/mcp"
    }
  }
}

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