v0.3.0 — x402 payment framework for FastAPI (226 tests)

Author: Chet Parker

.env.example

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+# x402-fastapi-kit configuration
+# Copy to .env and fill in your values
+
+# REQUIRED: Your wallet address (EVM hex or Solana base58)
+X402_PAY_TO=0xYOUR_WALLET_ADDRESS_HERE
+
+# Network (default: Base Sepolia testnet)
+X402_NETWORK=eip155:84532
+
+# Facilitator URL (default: testnet facilitator)
+X402_FACILITATOR_URL=https://x402.org/facilitator
+
+# Default price for gated routes
+X402_DEFAULT_PRICE=$0.01
+
+# Server
+X402_HOST=0.0.0.0
+X402_PORT=8000
+X402_DEBUG=true
+
+# Optional: Solana address (for dual-chain support)
+# X402_SVM_PAY_TO=YourSolanaAddress
+
+# Optional: CDP credentials (for mainnet facilitator)
+# X402_CDP_API_KEY_ID=
+# X402_CDP_API_KEY_SECRET=
+
+# ── Phase 2: Access Control ──────────────────────────────
+
+# Rate limiting (enabled by default)
+X402_RATE_LIMIT_ENABLED=true
+X402_RATE_LIMIT_RPM=60
+# Per-route limits: path=rpm,path=rpm
+# X402_RATE_LIMIT_ROUTES=/weather=30,/forecast=10
+
+# API key fallback auth
+X402_API_KEYS_ENABLED=false
+# Keys as name=secret,name=secret
+# X402_API_KEYS=partner1=sk_live_abc123,internal=sk_agent_xyz
+
+# Wallet allowlist
+X402_ALLOWLIST_ENABLED=false
+# Comma-separated addresses
+# X402_ALLOWLIST_ADDRESSES=0xPartner1...,0xMyAgent...

.gitignore

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+__pycache__/
+*.pyc
+*.pyo
+.env
+.venv/
+dist/
+build/
+*.egg-info/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+htmlcov/
+.coverage

LICENSE

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+MIT License
+
+Copyright (c) 2026 x402-fastapi-kit contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.