MCP server Peer

peer-cli

The canonical agent interface for Peer: one JSON-first CLI, local and hosted MCP servers, and one generated contract for protocol, indexer, market, checkout, and Peer Cash workflows.

• Docs and agent-readable text: https://agents.peer.xyz
• Exact CLI schemas: agents/tool-catalog.json
• Error contract: agents/error-catalog.json
• Runtime profiles and counts: agents/runtime-manifest.json

The generated files come from the runtime registries. Do not hand-maintain a second command list in documentation.

Install

Node.js 22 or newer is required.

The package is peer-protocol-cli; do not install the unrelated unscoped peer-cli package.

npm install --global peer-protocol-cli@0.4.1
peer --help

Run without a global install:

npx -y peer-protocol-cli@0.4.1 quote --from USD --amount 100 --platform wise

Successful output is JSON by default. Errors always use the canonical JSON error envelope on stderr. --format table changes successful human-facing output only.

Safety model

Read commands execute immediately. Commands that can mutate state return a transaction or API preview first and execute only when the process receives --yes.

Signer material resolves from PEER_PRIVATE_KEY or --wallet-path. Passing a private key on the command line is supported but visible in process listings; prefer the environment or an owner-readable wallet file. Persistent config and checkout caches are written with owner-only permissions.

Never start a write-capable MCP process with --yes unless every write tool in that process is intentionally allowed to broadcast without a second CLI preview.

MCP profiles

peer mcp requires one of three explicit profiles:

• read-only — default protocol reads plus Peer Cash reads. No signing or broadcasting.
• cash — the complete custody-separated peer_cash_* surface. It prepares unsigned transaction plans but never accepts a private key, signs, or broadcasts.
• full — every generic CLI-backed MCP tool plus Peer Cash. Generic write tools still preview unless the MCP process was started with global --yes.

The current tool counts are generated in agents/runtime-manifest.json.

{
  "mcpServers": {
    "peer": {
      "command": "npx",
      "args": [
        "-y",
        "peer-protocol-cli@0.4.1",
        "mcp",
        "--profile",
        "read-only"
      ]
    }
  }
}

Use --profile cash for the portable Peer Cash workflow or --profile full for the complete operator surface.

The hosted MCP server exposes only the read-only profile over Streamable HTTP:

https://mcp.peer.xyz/mcp

Run the same transport yourself with peer mcp --transport http. HTTP refuses the cash and full profiles; those authority-bearing profiles remain local stdio processes.

Peer Cash

The retired standalone peer-cash-mcp server now lives here. Its tool names and custody boundary are unchanged:

1. peer_cash_capabilities / peer_cash_source_capabilities — fetch live payout rails and Relay-supported source chains and tokens.
2. peer_cash_fill_stats / peer_cash_buyer — inspect historical fill evidence and buyer protocol history.
3. peer_cash_quote_source / peer_cash_relay_status — quote and track a cross-chain route into Base USDC without granting signer authority.
4. peer_cash_estimate — estimate fiat received at the current oracle rate.
5. peer_cash_prepare — return ordered unsigned approval and deposit transactions.
6. peer_cash_finalize — resolve a confirmed receipt into a durable depositId.
7. peer_cash_order / peer_cash_orders — resume and inspect orders.
8. peer_cash_prepare_access_policy, peer_cash_prepare_withdraw, and peer_cash_prepare_top_up — prepare follow-up transactions.

Base USDC amounts are decimal strings in 6-decimal base units: 100 USDC is 100000000. Estimates are not locked quotes; the binding Chainlink rate resolves when a buyer fills.

Install the packaged portable skill from skills/peer-cash/SKILL.md when the agent host supports Agent Skills.

Configuration

Configuration resolves in this order:

1. CLI flags
2. environment variables
3. ~/.peer/config.json
4. runtime defaults

Common settings:

• PEER_ENV: production, preproduction, or staging
• PEER_PRIVATE_KEY / PEER_WALLET_PATH: signer material for generic write commands
• PEER_RPC_URL: Base RPC override
• PEER_API_KEY: Curator API key when required
• PEER_INDEXER_API_KEY / PEER_INDEXER_URL: indexer overrides
• PEER_MARKET_API_KEY / PEER_MARKET_BASE_URL: Peerlytics access
• PEER_PAY_API_KEY / PEER_PAY_BASE_URL: hosted checkout access
• PEER_BASE_API_URL: Curator override. Defaults follow PEER_ENV: api.zkp2p.xyz, api-preprod.zkp2p.xyz, or api-staging.zkp2p.xyz.
• PEER_CASH_RPC_URL, PEER_CASH_API_KEY, PEER_CASH_REFERRAL_CODE, and PEER_CASH_REFERRER: cash-profile overrides

Use peer config show, set, unset, and reset for persistent local settings. peer config show masks secret values. Prefer environment variables for credentials.

Command families

The CLI covers:

• quotes, payee registration, and payee-hash resolution
• deposit lifecycle, payment methods, currencies, oracle configuration, and batch updates
• intents, pre-intent hooks, fulfillment, release, and cleanup
• StakeVault deposits, withdrawals, authorization, indexed freshness, and matured chargeback releases
• IntentGuardian policy, live extension quotes, payer funding, and preview-first intent extension
• ProtocolViewer and indexer reads, including a raw GraphQL escape hatch
• vaults, rate managers, delegation, fees, and snapshots
• Peerlytics market, explorer, history, attribution, and API-key operations
• USDC balances and transfers
• hosted checkout creation, reads, cancellation, and local resume cache
• local config and environment inspection

Run peer --help, peer <family> --help, or inspect the generated tool catalog for the exact current paths, flags, schemas, auth requirements, and danger markers.

Every command also accepts --params <json> and --params-file <path>. Typed flags override raw values.

Development

This repository uses npm and its committed package-lock.json.

npm install
npm run dev -- quote --from USD --amount 100 --platform wise
npm run check

npm run build regenerates all agent catalogs before bundling peer and the public MCP library entry point. Run npm run test:e2e after changing networked flows or checkout behavior.

The documentation application for agents.peer.xyz is owned by zkp2p/zkp2p-clients at clients/agents; this repository owns the executable runtime, package manifests, portable skill, and generated contracts it documents.

Release, deploy and publish

One release ships three things from the same commit: the hosted MCP server (https://mcp.peer.xyz), the npm package peer-protocol-cli, and the MCP Registry entry from server.json. Do them in this order:

1. Version on main. Align the version in package.json, mcp.json, plugin.json, server.json and the packaged skill, and merge to main with CI green.
2. Deploy. Fast-forward releases/prod to that commit. .github/workflows/deploy.yml requires a successful ci.yml run for the commit, builds deploy/Dockerfile, and deploys it over SSM with peer-deploy's blue-green strategy. Afterwards https://mcp.peer.xyz/health reports the new version.
3. Publish to npm. Dispatch publish.yml on main while main still points at the release commit. It runs npm run check and npm publish through npm trusted publishing (GitHub OIDC); there is no npm token.
4. Publish to the MCP Registry. Dispatch publish-mcp.yml on main. It checks that npm has peer-protocol-cli@<server.json version> and that the hosted /health reports that version, then publishes server.json with GitHub OIDC. It skips a version the registry already has.

Production config is Infisical project mcp, env prod; config CD snapshots it to Secrets Manager peer/mcp/prod and runs Deploy releases/prod (reconcile) automatically. Roll back the hosted server by moving releases/prod to the last known-good commit; npm and registry versions are not rolled back, so ship a new version instead. Deploy output is in CloudWatch /peer/deploy/mcp. See deploy/AWS.md for details.

UPI

UPI/INR is available in production, preproduction and staging, matching the @zkp2p/sdk catalog. peer config platforms lists it alongside the other rails, and peer quote --from INR --amount 100 --platform upi requests a quote. Deposit creation, payee registration and intent previews accept the same platform.