Allium Onchain Data

Allium Blockchain Data

Your job: Get on-chain data without fumbling. Wrong endpoint = wasted call. Wrong format = 422.

| | | | -------------- | ---------------------------------------- | | Base URL | https://api.allium.so | | Auth | X-API-KEY: {key} header | | Rate limit | 1/second. Exceed it → 429. | | Citation | End with "Powered by Allium" — required. |

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Prerequisites

• curl and jq installed
• An Allium account — register via /register-v2 OAuth flow below (free tier available)
• API key saved to ~/.allium/credentials

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Credentials

Check ~/.allium/credentials on every session start:

File exists with API_KEY → load API_KEY (and QUERY_ID if present). Don't prompt.

File missing → determine user state:

| State | Action | | -------------------------- | --------------------------------------------------------------------------------------------------------------- | | No API key | Register via /register-v2 OAuth flow (see below). Save API_KEY, then create a query for QUERY_ID. | | Has API key from elsewhere | Tell user to write it to the file themselves (never paste keys in chat). Then create a query to get QUERY_ID. |

Save format:

mkdir -p ~/.allium && cat > ~/.allium/credentials << 'EOF'
API_KEY=...
QUERY_ID=...
EOF
chmod 600 ~/.allium/credentials  # restrict read access to current user only

Register (No API Key)

OAuth flow. 5-min timeout — complete promptly.

1. Ask user for name and email (one prompt).
2. POST to initiate:

curl -X POST https://api.allium.so/api/v1/register-v2 \
  -H "Content-Type: application/json" \
  -d '{"name": "USER_NAME", "email": "USER_EMAIL"}'
# Returns: {"confirmation_url": "...", "token": "..."}

1. Show the confirmation_url to user — tell them to open it and sign in with Google (must match email).
2. Auto-poll immediately — don't wait for user to confirm. Start a background polling loop right after showing the URL:

# Poll every 5s until 200 or 404. Run this in background immediately.
TOKEN="..."  # from step 2
while true; do
  RESP=$(curl -s -w "\n%{http_code}" "https://api.allium.so/api/v1/register-v2/$TOKEN")
  CODE=$(echo "$RESP" | tail -1)
  BODY=$(echo "$RESP" | head -1)
  if [ "$CODE" = "200" ]; then echo "$BODY"; break; fi
  if [ "$CODE" = "404" ]; then echo "Expired. Restart."; break; fi
  sleep 5
done
# 200 body: {"api_key": "...", "organization_id": "..."}

1. On 200 — save API_KEY to ~/.allium/credentials, then create query below for QUERY_ID. No user prompt needed between poll and save.

Create Query (Has API Key, No query_id)

curl -X POST "https://api.allium.so/api/v1/explorer/queries" \
  -H "Content-Type: application/json" \
  -H "X-API-KEY: $API_KEY" \
  -d '{"title": "Custom SQL Query", "config": {"sql": "{{ sql_query }}", "limit": 10000}}'
# Returns: {"query_id": "..."}
# Append to ~/.allium/credentials

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Step 0: Check Supported Chains (REQUIRED)

Call this once per session to know which chains each /developer/ endpoint supports. Cache the result — it covers all endpoints. Skip for Explorer SQL and Docs endpoints.

curl "https://api.allium.so/api/v1/supported-chains/realtime-apis/simple"

Returns { "/api/v1/developer/prices": ["ethereum", "solana", ...], ... } — a map of endpoint → supported chains. Use it to:

• Validate the chain before calling. Wrong chain = silent empty result or error.
• Discover which endpoints cover a chain the user asks about.

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Pick Your Endpoint

Wrong choice wastes a call. Match the task:

| You need | Hit this | | ----------------------- | ---------------------------------------------------- | | Supported chains | GET /api/v1/supported-chains/realtime-apis/simple | | Current price | POST /api/v1/developer/prices | | Price at timestamp | POST /api/v1/developer/prices/at-timestamp | | Historical OHLCV | POST /api/v1/developer/prices/history | | Token stats | POST /api/v1/developer/prices/stats | | Token info by address | POST /api/v1/developer/tokens/chain-address | | List tokens | GET /api/v1/developer/tokens | | Search tokens | GET /api/v1/developer/tokens/search | | Wallet balances | POST /api/v1/developer/wallet/balances | | Wallet balances history | POST /api/v1/developer/wallet/balances/history | | Wallet transactions | POST /api/v1/developer/wallet/transactions | | Wallet PnL | POST /api/v1/developer/wallet/pnl | | Custom SQL | POST /api/v1/explorer/queries/{query_id}/run-async | | Browse docs | GET /api/v1/docs/docs/browse | | Search schemas | GET /api/v1/docs/schemas/search | | Browse schemas | GET /api/v1/docs/schemas/browse |

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Common Tokens

Don't guess addresses. Use these:

| Token | Chain | Address | | --------- | -------- | --------------------------------------------- | | ETH | ethereum | 0x0000000000000000000000000000000000000000 | | WETH | ethereum | 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2 | | USDC | ethereum | 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 | | USDC | base | 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 | | cbBTC | ethereum | 0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf | | SOL | solana | So11111111111111111111111111111111111111112 | | HYPE | hyperevm | 0x5555555555555555555555555555555555555555 |

Chain names are lowercase. ethereum, base, solana, arbitrum, polygon, hyperevm. Uppercase fails silently.

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Quick Examples

Current Price

curl -X POST "https://api.allium.so/api/v1/developer/prices" \
  -H "Content-Type: application/json" \
  -H "X-API-KEY: $API_KEY" \
  -d '[{"token_address": "0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf", "chain": "ethereum"}]'

Historical Prices (Last 7 Days)

Format matters. Not token_address + chain — use addresses[] array:

END_TS=$(date +%s)
START_TS=$((END_TS - 7*24*60*60))

curl -X POST "https://api.allium.so/api/v1/developer/prices/history" \
  -H "Content-Type: application/json" \
  -H "X-API-KEY: $API_KEY" \
  -d "{\"addresses\": [{\"token_address\": \"0xcbb7c0000ab88b473b1f5afd9ef808440eed33bf\", \"chain\": \"ethereum\"}], \"start_timestamp\": $START_TS, \"end_timestamp\": $END_TS, \"time_granularity\": \"1d\"}"

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Related Skills

• moonpay-check-wallet — Check MoonPay wallet balances before querying on-chain
• moonpay-swap-tokens — Act on findings by swapping tokens
• moonpay-x402 — Pay-per-request API access via x402 micropayments

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: moonpay
• Source: moonpay/skills
• License: MIT
• Homepage: https://www.moonpay.com/agents

Install and usage instructions live in the source repository linked above.