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HPP x402 MCP Bridge

io.github.hpp-io/x402-mcp-bridge·v0.1.7·Finance & Payments

MCP bridge for autonomous x402 payments in HPP USDC.e — discover and pay for services per call.

In-path gate · all MCP tools

Using HPP x402 MCP Bridge in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts—before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

curl -fsSL https://mcpindex.ai/install.sh | sh
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

Environment variables
DELEGATE_PRIVATE_KEY
secret

Delegate EOA private key used to sign payments. Auto-created in the OS keychain if unset.

HPP_NETWORK

Target network: eip155:181228 (HPP Sepolia, default) or eip155:190415 (HPP Mainnet).

RESOURCE_SERVER_URL

Optional upstream MCP server to proxy. Omit to expose only the local tools.

SAFE_ADDRESS

Safe address for governance (Safe) mode. Set together with ALLOWANCE_MODULE_ADDRESS.

ALLOWANCE_MODULE_ADDRESS

Safe AllowanceModule address for governance (Safe) mode. Set together with SAFE_ADDRESS.

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
25
installability
25
documentation
15
stability
5
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