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x402-spendguard

https://github.com/x402spendguard/x402-spendguard
● healthy agent-verification-security

Client-side spend firewall for agents paying via x402: enforces a user's deterministic policy before the payment is signed — destination allowlist, per-request/domain/global caps, and binding checks (signed value, recipient, asset, and capability lifetime must match the 402 challenge). Mechanism-not-policy (no reputation scoring or heuristics), fail-closed, with durable cross-process spend accounting and a tamper-evident decision log. TypeScript, MIT, zero runtime dependencies, no network egress. Pre-alpha and testnet-validated (Base Sepolia); not yet for mainnet. ([npm](https://www.npmjs.com/package/x402-spendguard))

Category
agent-verification-security
Chains
—
Price
—

Quality grade

How grading works
D 40.0 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 200)
Payability 0.0 / 20
  • ✗ Answers a real HTTP 402 challenge
  • ✗ Publishes a /.well-known/x402 descriptor
  • ✗ Payment address on record
  • ✗ Settlement network declared
  • ✗ Price declared
Demand 0.0 / 40
No payment address on record, so demand cannot be measured
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 6 h ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://github.com/x402spendguard/x402-spendguard

Listed in

Directories this entry was found in.

awesome-x402