api.octodamus.com
Octodamus is an AI market intelligence oracle for finance, investing, NYSE equities, and Bitcoin. Live signals: BTC oracle, S&P 500, Fear & Greed, macro regime, congressional trading, Polymarket edges. 27 data feeds. Free API — 500 req/day.
TradingLiveeip155:8453Exactvia cdp
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far.
$23.44
Verified settled volume
112 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-28 13:27Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x5c6B3a3dAe296d3cef50fef96afC73410959a6DbThe wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"x402": "x402/1",
"agent": "Octodamus",
"error": "payment_required",
"pay_to": "0x5c6B3a3dAe296d3cef50fef96afC73410959a6Db",
"network": "base-mainnet (eip155:8453)",
"preview": "GET https://api.octodamus.com/v2/polymarket/odds/preview",
"product": "polymarket_odds",
"price_usdc": 0.02
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x5c6B…9a6Db. The signed payment is good for 5 minutes.
- Paid to
- 0x5c6B…9a6Db
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
- Buys
- Live crypto prediction-market facts from Polymarket: normalized YES/NO odds (implied probability), 24h volume, liquidity, CLOB order-book spread, and resolution status per market. Not a prediction.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"chainId": 8453,
"version": "2"
},
"payTo": "0x5c6B3a3dAe296d3cef50fef96afC73410959a6Db",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://api.octodamus.com/v2/polymarket/odds",
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"headers": {
"PAYMENT-SIGNATURE": "x402 EIP-3009 USDC payment (Base mainnet)"
}
},
"output": {
"type": "json",
"example": {
"count": 2,
"markets": [
{
"spread": 0.01,
"question": "Will Bitcoin reach $67,500 in July?",
"yes_price": 0.545,
"resolution": "open",
"liquidity_usd": 23315.17,
"implied_prob_pct": 54.5
}
]
}
}
},
"name": "Octodamus Polymarket Odds",
"tags": [
"polymarket",
"prediction market",
"odds",
"implied probability",
"order book",
"liquidity",
"crypto",
"BTC",
"market data",
"Base USDC"
],
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"type": "object",
"required": [
"method"
],
"properties": {
"method": {
"type": "string",
"const": "GET"
},
"headers": {
"type": "object",
"required": [
"PAYMENT-SIGNATURE"
],
"properties": {
"PAYMENT-SIGNATURE": {
"type": "string",
"description": "x402 EIP-3009 USDC payment signature (Base mainnet)"
}
}
}
}
},
"output": {
"type": "object",
"properties": {
"action": {
"enum": [
"BUY",
"SELL",
"HOLD"
],
"type": "string"
},
"signal": {
"enum": [
"BULLISH",
"BEARISH",
"NEUTRAL"
],
"type": "string"
},
"btc_trend": {
"enum": [
"UP",
"DOWN",
"SIDEWAYS"
],
"type": "string"
},
"reasoning": {
"type": "string"
},
"confidence": {
"type": "number",
"maximum": 1,
"minimum": 0
},
"fear_greed": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"polymarket_edge": {
"type": "object"
}
}
}
}
},
"category": "trading",
"discoverable": true
}
},
"description": "Live crypto prediction-market facts from Polymarket: normalized YES/NO odds (implied probability), 24h volume, liquidity, CLOB order-book spread, and resolution status per market. Not a prediction.",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"headers": {
"PAYMENT-SIGNATURE": "x402 EIP-3009 USDC payment (Base mainnet)"
}
},
"output": {
"type": "json",
"example": {
"count": 2,
"markets": [
{
"spread": 0.01,
"question": "Will Bitcoin reach $67,500 in July?",
"yes_price": 0.545,
"resolution": "open",
"liquidity_usd": 23315.17,
"implied_prob_pct": 54.5
}
]
}
}
},
"name": "Octodamus Polymarket Odds",
"tags": [
"polymarket",
"prediction market",
"odds",
"implied probability",
"order book",
"liquidity",
"crypto",
"BTC",
"market data",
"Base USDC"
],
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"type": "object",
"required": [
"method"
],
"properties": {
"method": {
"type": "string",
"const": "GET"
},
"headers": {
"type": "object",
"required": [
"PAYMENT-SIGNATURE"
],
"properties": {
"PAYMENT-SIGNATURE": {
"type": "string",
"description": "x402 EIP-3009 USDC payment signature (Base mainnet)"
}
}
}
}
},
"output": {
"type": "object",
"properties": {
"action": {
"enum": [
"BUY",
"SELL",
"HOLD"
],
"type": "string"
},
"signal": {
"enum": [
"BULLISH",
"BEARISH",
"NEUTRAL"
],
"type": "string"
},
"btc_trend": {
"enum": [
"UP",
"DOWN",
"SIDEWAYS"
],
"type": "string"
},
"reasoning": {
"type": "string"
},
"confidence": {
"type": "number",
"maximum": 1,
"minimum": 0
},
"fear_greed": {
"type": "number",
"maximum": 100,
"minimum": 0
},
"polymarket_edge": {
"type": "object"
}
}
}
}
},
"category": "trading",
"discoverable": true
}
}Provenance
- Seen in the source catalog
- 2026-07-28 13:27Z
- Last indexed by Roundhouse
- 2026-08-27 13:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-22 09:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 3 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service api.octodamus.com and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=api.octodamus.com' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.octodamus.com/v2/polymarket/odds, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.