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Interline MCP server

by Choppaaahh·io.github.Choppaaahh/interline·v0.1.3
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Neutral, non-custodial MCP payment router: discover rails, then pay across them.

B75/100grade B
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Safety scan
B75/100

full report

Adoption
New

0 stars28 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Interline tools (4, 1 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • discover_payment_rails

    Probe a paid endpoint and report which payment rails it accepts + the price for each — WITHOUT paying.

  • list_known_rails

    List EVERY agent-payment rail/protocol Interline knows about + how it relates to each — the neutral catalog.

  • pay_for_resourcewrite action

    Pay for and fetch a paywalled resource, returning its content + a settlement receipt.

  • payment_history

    Return the most recent cross-rail settlement receipts — the unified ledger across every rail paid through.

Public scan report

scanner v0.1.9 · 2026-09-26 · same rubric, same numbers if you re-run it

no findings
  • Code scan20 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitystatic API keys via environment variables6/15
  • Maintenancelast push 76 days ago12/15
  • Maintainer identityregistry namespace matches repository owner6/10
Overall 75/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Interline compares

Against every graded Finance MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
75/100
higher than 50% of 1,761 Finance servers
Tools
4
the typical Finance server has 8
Tools that change things
25%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
28
more than 16% of 421 Finance servers with a package

What its tools let an agent do: 2 read · 2 change

Install Interline in Claude Code, Cursor or VS Code

claude mcp add interline -- uvx interline
Add to Cursor

What the publisher says

From the Interline repository's README, as published. We do not edit it. Read it on GitHub

Interline — agent-to-agent payment router

An agent-to-agent payment router: one agent does work, another agent pays for it, no human keys a card. Interline is a neutral, non-custodial router over the fragmented agent-payment-rail stack — "OpenRouter for agent payments." Built on x402 (HTTP-402 micropayments, USDC), aggregator-shaped so adding a rail is one adapter, not a rewrite.

Today it routes payments across three live rails — x402 USDC on EVM (Base Sepolia) and on Solana (devnet), plus MPP on Tempo (Moderato testnet) — all behind one Paywall.gate() call. Real on-chain agent-to-agent settles are confirmed on all three. It ships an MCP router so agents can discover + pay endpoints, and includes a Google-AP2 inbound adapter — a signed AP2 mandate (verified, constraint-checked + freshness-gated) settles non-custodially on the rails.

Run the demo (no wallet, no faucet, no risk)

python3 -m venv .venv && source .venv/bin/activate
pip install -r requirements.txt
python3 run_demo.py

Expected: DEMO PASS — agent paid agent, settlement receipt issued.

What just happened (the x402 "exact-evm" loop):

buyer GET /work
  -> seller 402 + PaymentRequirements {amount, asset=USDC, payTo, network}
  -> buyer signs an EIP-3009 transferWithAuthorization (gasless USDC auth)
  -> buyer retries with X-PAYMENT header (base64 signed payload)
  -> facilitator VERIFIES the signature (real signer-recovery) + checks policy
  -> facilitator SETTLES (mock: fake tx hash; live: on-chain USDC transfer)
  -> seller 200 + work product + X-PAYMENT-RESPONSE receipt (tx hash)

The facilitator's verify step is real cryptography even in mock mode — it recovers the EIP-712 signer and matches it to the authorization. Only the on-chain broadcast is mocked. So a passing demo proves the buyer's signing is protocol-correct against real USDC.

Files

Go live (Base Sepolia testnet)

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Interline: common questions

Is Interline MCP server safe?
Mostly: it is graded B (75/100). Read the Interline safety report
How do I install Interline?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Interline need an API key?
Yes. The registry entry asks for APV0_BUYER_PRIVATE_KEY.
Is Interline maintained?
The last commit was 115 days ago (2026-07-12). The latest release is v0.1.3.
What can I use instead of Interline?
Servers from other publishers that do the same job: three.ws Agent Payments MCP server, Blockrun MCP server and Agent402.Tools: pay-per-call web tools MCP server.
How does Interline compare with other Finance MCP servers?
safety score 75/100 (higher than 50% of 1,761 Finance servers); tools 4 (the typical Finance server has 8); tools that change things 25% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Interline

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