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feat(x402): route payments through mcp.openmm.io proxy via split execution #31

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Merged
adacapo21 merged 4 commits into from
Apr 1, 2026
+176 −333
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feat(x402): route payments through mcp.openmm.io proxy via split execution #31

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66b2a9a
docs: document x402 auto-payment, PAYMENT_SERVER alias, and new env vars
adacapo21 Apr 1, 2026
21565a6
feat(x402): route payments through mcp.openmm.io proxy via split exec…
adacapo21 Apr 1, 2026
fd383dc
style: remove inline comments from payment module
adacapo21 Apr 1, 2026
65d5729
refactor: declare PAYMENT_SERVER default in .env.example instead of s…
adacapo21 Apr 1, 2026
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24 changes: 15 additions & 9 deletions .env.example
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Expand Up @@ -4,17 +4,23 @@ INDEXER_URL=https://analytics.indigoprotocol.io/api/v1
BLOCKFROST_API_KEY=

# ── x402 payment gating (optional — omit or leave blank to disable) ──────────
# EVM wallet address to receive USDC on Base (required to enable EVM payments)
X402_EVM_ADDRESS=
#
# Payment uses the split execution flow: signing happens locally, verification
# and settlement route through the openmm.io proxy (or your own PAYMENT_SERVER).
# Private keys never leave this process.
#
# To enable: set X402_PRIVATE_KEY to your EVM wallet private key.
# The wallet pays for tool calls; funds must be available in USDC on Base.

# Cardano address (optional) — NOTE: @qbtlabs/x402 v0.5.0 does not yet emit a
# Cardano entry in 402 accepts[] because USDC_CONTRACTS has no cardano: entry.
# Setting this enables Cardano payment *verification* but not advertisement.
# Leave blank until a future x402 release adds native Cardano token support.
X402_CARDANO_ADDRESS=
# EVM private key of the payer wallet (0x-prefixed). Enables auto-payment.
X402_PRIVATE_KEY=

# Set to "true" to use testnets (Base Sepolia = chainId 84532, Cardano preprod)
# Proxy / settlement worker URL. Override for self-hosted deployments.
PAYMENT_SERVER=https://mcp.openmm.io

# Set to "true" to use Base Sepolia testnet
X402_TESTNET=false

# Override default facilitator URL (defaults to https://x402.org/facilitator)
# Legacy: direct facilitator URL fallback (used only when PAYMENT_SERVER is unset
# and you want to bypass mcp.openmm.io). Defaults to https://mcp.openmm.io.
X402_FACILITATOR_URL=
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