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    D20DAO Verifiable Randomness

    mcpkey · package official
    org.d20dao/vrf · v0.1.2
    deploy just this

    Verifiable VRF draws on Arc, 0.05 USDC each. On Robinhood Chain, integrate on chain with the SDK.

    run it

    on your own machines, one way per deploy method
    generated from the record, not tested yet
    # once, as root:
# as_mcp DIR COMMAND...: runs COMMAND as the mcp user in DIR, its home, sandboxed as the
# units are: a package's install scripts can write to DIR only, as the server later can
as_mcp() {
  local dir="$1"; shift
  systemd-run --quiet --wait --pipe --collect --uid=mcp --gid=mcp \
    -p WorkingDirectory="$dir" -p Environment=HOME="$dir" -p ReadWritePaths="$dir" \
    -p NoNewPrivileges=true -p ProtectSystem=strict -p ProtectHome=true -p PrivateTmp=true \
    -- "$@" </dev/null
}
install -d -m 0750 -o mcp -g mcp /var/lib/mcp/vrf
# vrf: its packages, installed whole before its unit starts (no session installs)
# npx takes a half-installed tree for installed: a rerun starts them afresh
systemctl stop mcp-my-agent-vrf.service 2>/dev/null || true
as_mcp /var/lib/mcp/vrf rm -rf /var/lib/mcp/vrf/.npm/_npx
as_mcp /var/lib/mcp/vrf npx --yes --package=@d20dao/[email protected] -- true
as_mcp /var/lib/mcp/vrf npx --yes --package=supergateway@4 -- true

#!/usr/bin/env bash
# vrf (org.d20dao/vrf), recipe baremetal (generated).
# Generated by Hub for toolset "my-agent"; started by mcp-my-agent-vrf.service.
set -euo pipefail
export HOST=127.0.0.1 PORT=8101
exec npx -y supergateway@4 --stdio 'npx -y @d20dao/[email protected]' --outputTransport streamableHttp --stateful --host 127.0.0.1 --port 8101 --streamableHttpPath /mcp --healthEndpoint /healthz

[Unit]
Description=MCP server vrf (toolset my-agent), generated by Hub
After=network-online.target
Wants=network-online.target

[Service]
Type=simple
User=mcp
Group=mcp
EnvironmentFile=/etc/mcp/my-agent.env
Environment=HOME=/var/lib/mcp/vrf
WorkingDirectory=/var/lib/mcp/vrf
ExecStart=/opt/mcp/my-agent/bin/vrf.sh
Restart=on-failure
RestartSec=5
NoNewPrivileges=true
ProtectSystem=strict
ProtectHome=true
PrivateTmp=true
ReadWritePaths=/var/lib/mcp/vrf

[Install]
WantedBy=multi-user.target
    generated from the record, not tested yet
    docker run --rm -p 127.0.0.1:8101:8000 -e D20_DAILY_LIMIT_USDC -e D20_NETWORK -e D20_PAY_CHAIN -e D20_WALLET_ADDRESS -e D20_CIRCLE_CLI -e D20_MCP_HOME node:22-alpine sh -c 'npx -y supergateway@4 --stdio '"'"'npx -y @d20dao/[email protected]'"'"' --outputTransport streamableHttp --stateful --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz'
    generated from the record, not tested yet
    # Generated by Hub for toolset "my-agent" (2026-10-18T17:08:41+00:00).
# Each package server runs behind a stdio->HTTP bridge and listens on localhost only.
#   cp .env.example .env    # fill the ${VAR}s
#   docker compose up -d && bash smoke.sh
# Remote servers are not here: clients reach them directly (see clients/).
name: mcp-my-agent
services:
  vrf:
    image: node:22-alpine
    command:
    - sh
    - -c
    - npx -y supergateway@4 --stdio 'npx -y @d20dao/[email protected]' --outputTransport streamableHttp --stateful
      --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz
    ports:
    - 127.0.0.1:8101:8000
    volumes:
    - npm-cache:/root/.npm
    healthcheck:
      test:
      - CMD-SHELL
      - wget -qO- http://127.0.0.1:8000/healthz || exit 1
      interval: 30s
      timeout: 5s
      retries: 5
      start_period: 2m
    restart: unless-stopped
    environment:
      D20_DAILY_LIMIT_USDC: ${D20_DAILY_LIMIT_USDC}
      D20_NETWORK: ${D20_NETWORK}
      D20_PAY_CHAIN: ${D20_PAY_CHAIN}
      D20_WALLET_ADDRESS: ${D20_WALLET_ADDRESS}
      D20_CIRCLE_CLI: ${D20_CIRCLE_CLI}
      D20_MCP_HOME: ${D20_MCP_HOME}
volumes:
  npm-cache: {}
  uv-cache: {}
    generated from the record, not tested yet
    # Generated by Hub for toolset "my-agent" (2026-10-18T17:08:41+00:00).
#   kubectl create namespace mcp
#   kubectl -n mcp create secret generic mcp-credentials --from-env-file=.env
#   kubectl apply -f kubernetes.yaml
# Services are cluster-internal: <name>.mcp.svc.cluster.local:8000/mcp. Put an ingress
# with auth in front before exposing any of them.
apiVersion: v1
kind: Namespace
metadata:
  name: mcp
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: vrf
  namespace: mcp
  labels: &id001
    app: vrf
spec:
  replicas: 1
  selector:
    matchLabels: *id001
  template:
    metadata:
      labels: *id001
    spec:
      containers:
      - name: vrf
        image: node:22-alpine
        ports:
        - containerPort: 8000
          name: http
        env:
        - name: D20_DAILY_LIMIT_USDC
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: D20_DAILY_LIMIT_USDC
        - name: D20_NETWORK
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: D20_NETWORK
        - name: D20_PAY_CHAIN
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: D20_PAY_CHAIN
        - name: D20_WALLET_ADDRESS
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: D20_WALLET_ADDRESS
        - name: D20_CIRCLE_CLI
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: D20_CIRCLE_CLI
        - name: D20_MCP_HOME
          valueFrom:
            secretKeyRef:
              name: mcp-credentials
              key: D20_MCP_HOME
        args:
        - sh
        - -c
        - npx -y supergateway@4 --stdio 'npx -y @d20dao/[email protected]' --outputTransport streamableHttp --stateful
          --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz
        readinessProbe:
          httpGet:
            path: /healthz
            port: http
          initialDelaySeconds: 10
---
apiVersion: v1
kind: Service
metadata:
  name: vrf
  namespace: mcp
spec:
  selector:
    app: vrf
  ports:
  - port: 8000
    targetPort: http
    name: http
    generated from the record, not tested yet
    # Generated by Hub for toolset "my-agent" (2026-10-18T17:08:41+00:00).
# Credentials come from the Secret 'mcp-credentials' (kubectl create secret generic ... --from-env-file=.env).
# Each server under `servers` is one Deployment + Service; the keys after it configure
# upstream charts a worker verified.
servers:
  vrf:
    enabled: true
    replicas: 1
    port: 8000
    path: /mcp
    container:
      name: vrf
      image: node:22-alpine
      ports:
      - containerPort: 8000
        name: http
      env:
      - name: D20_DAILY_LIMIT_USDC
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: D20_DAILY_LIMIT_USDC
      - name: D20_NETWORK
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: D20_NETWORK
      - name: D20_PAY_CHAIN
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: D20_PAY_CHAIN
      - name: D20_WALLET_ADDRESS
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: D20_WALLET_ADDRESS
      - name: D20_CIRCLE_CLI
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: D20_CIRCLE_CLI
      - name: D20_MCP_HOME
        valueFrom:
          secretKeyRef:
            name: mcp-credentials
            key: D20_MCP_HOME
      args:
      - sh
      - -c
      - npx -y supergateway@4 --stdio 'npx -y @d20dao/[email protected]' --outputTransport streamableHttp --stateful
        --host 0.0.0.0 --port 8000 --streamableHttpPath /mcp --healthEndpoint /healthz
      readinessProbe:
        httpGet:
          path: /healthz
          port: http
        initialDelaySeconds: 10

# helm install my-agent helm/my-agent -n mcp

    in the cloud

    one click: the provider's deploy form opens filled in, in your own account
    koyeb
    deploy to koyeb

    The form opens with CHANGE_ME for each value you supply: D20_DAILY_LIMIT_USDC, D20_NETWORK, D20_PAY_CHAIN, D20_WALLET_ADDRESS, D20_CIRCLE_CLI, D20_MCP_HOME. Fill them in before you deploy.

    Clients connect to the service's https://…koyeb.app address plus /mcp.

    azure
    deploy to azuretemplate

    A Container Apps environment with one app per server, each with HTTPS ingress and one replica. The portal asks for each value you supply as a secure parameter; the deployment's outputs list the endpoints.

    connect to it

    copy what your client needs
    npx -y @d20dao/[email protected]
# env: D20_DAILY_LIMIT_USDC, D20_NETWORK, D20_PAY_CHAIN, D20_WALLET_ADDRESS, D20_CIRCLE_CLI, D20_MCP_HOME
    {
  "mcpServers": {
    "vrf": {
      "command": "npx",
      "args": [
        "-y",
        "@d20dao/[email protected]"
      ],
      "env": {
        "D20_DAILY_LIMIT_USDC": "${D20_DAILY_LIMIT_USDC}",
        "D20_NETWORK": "${D20_NETWORK}",
        "D20_PAY_CHAIN": "${D20_PAY_CHAIN}",
        "D20_WALLET_ADDRESS": "${D20_WALLET_ADDRESS}",
        "D20_CIRCLE_CLI": "${D20_CIRCLE_CLI}",
        "D20_MCP_HOME": "${D20_MCP_HOME}"
      }
    }
  }
}
    #!/usr/bin/env bash
# Registers every server with Claude Code (run once; `claude mcp list` to check).
set -euo pipefail
set -a; [ -f .env ] && source .env; set +a
claude mcp add vrf -e "D20_DAILY_LIMIT_USDC=${D20_DAILY_LIMIT_USDC}" -e "D20_NETWORK=${D20_NETWORK}" -e "D20_PAY_CHAIN=${D20_PAY_CHAIN}" -e "D20_WALLET_ADDRESS=${D20_WALLET_ADDRESS}" -e "D20_CIRCLE_CLI=${D20_CIRCLE_CLI}" -e "D20_MCP_HOME=${D20_MCP_HOME}" -- npx -y @d20dao/[email protected]

    {
  "mcpServers": {
    "vrf": {
      "command": "npx",
      "args": [
        "-y",
        "@d20dao/[email protected]"
      ],
      "env": {
        "D20_DAILY_LIMIT_USDC": "${D20_DAILY_LIMIT_USDC}",
        "D20_NETWORK": "${D20_NETWORK}",
        "D20_PAY_CHAIN": "${D20_PAY_CHAIN}",
        "D20_WALLET_ADDRESS": "${D20_WALLET_ADDRESS}",
        "D20_CIRCLE_CLI": "${D20_CIRCLE_CLI}",
        "D20_MCP_HOME": "${D20_MCP_HOME}"
      }
    }
  }
}
    {
  "servers": {
    "vrf": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@d20dao/[email protected]"
      ],
      "env": {
        "D20_DAILY_LIMIT_USDC": "${D20_DAILY_LIMIT_USDC}",
        "D20_NETWORK": "${D20_NETWORK}",
        "D20_PAY_CHAIN": "${D20_PAY_CHAIN}",
        "D20_WALLET_ADDRESS": "${D20_WALLET_ADDRESS}",
        "D20_CIRCLE_CLI": "${D20_CIRCLE_CLI}",
        "D20_MCP_HOME": "${D20_MCP_HOME}"
      }
    }
  }
}
    name: my-agent
target: local
servers:
- hub: org.d20dao/vrf
    • not probed yet: tools unpinned, ingest lists them

    tools

    Probe result: faileddocker: no MCP server found (:8000/mcp: HTTP 404: MCPError: MCP server process failed; :8000/: HTTP 404: MCPError: Not Found) PA] Warning: EnvHttpProxyAgent is experimental, expect them to change at any time. (Use `node --trace-warnings ...` to show where the warning was created) [supergateway] Child stderr: d20dao-mcp: bad settings: D20_NETWORK must be mainnet or testnet [supergateway] Child exited: code=1, signal=null; baremetal: MCPError: Connection closed; server stderr: …Warning: EnvHttpPr…

    runs · 1

    the latest tests of this entry by the hub and its workers, newest first
    dateworkermethodstatussandboxreason
    2026-10-17 11:40 local-mac-vm docker failed gvisor docker: no MCP server found (:8000/mcp: HTTP 404: MCPError: MCP server process failed; :8000/: HTTP 404: MCPError: Not Found) PA] Warning: EnvHttpProxyAgent is …