SYNTHORA
Garantizamos soberanía digital mediante ejecución autónoma. Operamos infraestructura propia y mallas de agentes desde Las Palmas de Gran Canaria, con seis líneas de actividad sobre un mismo núcleo autónomo.
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. 19 snapshots so far.
$6.81
Verified settled volume
397 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
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 2026-08-12 22:53Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x10800a5a5B9d72251566EC651E862A8b4B427dE0The 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.
{
"menu": {
"sla": "https://api.hergertsynthora.com/sla",
"menu": "https://api.hergertsynthora.com/llms.txt",
"note": "SYNTHORA: 120+ machine-payable data and risk services. Pay per call in USDC on Base via x402. Signed Ed25519 receipts.",
"terms": "https://hergertsynthora.com/terms",
"catalog": "https://catalog.hergertsynthora.com/catalog.json",
"openapi": "https://api.hergertsynthora.com/openapi.json"
},
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xEf879BFD6C4AccB8F795136de90246e1EC245e06",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://api.hergertsynthora.com/v1/prediction-markets",
"description": "Top prediction markets from Polymarket + Kalshi: implied probability, bid-ask spread, liquidity, volume and freshness seal. Essential feed for autonomous trading, political-risk and allocation agents. $0.001 USDC via x402 on Base. SYNTHORA. First call FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.",
"maxAmountRequired": "10000",
"maxTimeoutSeconds": 300
}
],
"freeTier": {
"note": "send header X-WALLET: 0x<your Base address> for a free trial",
"header": "X-WALLET",
"callsPerWallet": 1
},
"resource": {
"url": "https://api.hergertsynthora.com/v1/prediction-markets",
"tags": [
"prediction"
],
"iconUrl": "https://api.hergertsynthora.com/icon.svg",
"mimeType": "application/json",
"description": "Top prediction markets from Polymarket + Kalshi: implied probability, bid-ask spread, liquidity, volume and freshness seal. Essential feed for autonomous trading, political-risk and allocation agents. $0.001 USDC via x402 on Base. SYNTHORA. First call FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.",
"serviceName": "SYNTHORA"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"limit": 10,
"source": "all",
"min_liquidity": 1000
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"niche": "prediction_markets",
"result": {
"count": 1,
"source": "all",
"markets": [
{
"id": "559651",
"spread": 0.01,
"end_date": "2026-12-31T00:00:00Z",
"exchange": "polymarket",
"question": "Xi Jinping out before 2027?",
"volume_usd": 1234567.89,
"liquidity_usd": 278050.28,
"probability_yes": 0.05
}
],
"freshness_utc": "2026-08-07T12:00:00Z",
"total_liquidity_usd": 278050.28
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [],
"properties": {
"limit": {
"type": "integer",
"description": "max markets to return (1-50, default 10)"
},
"source": {
"enum": [
"all",
"polymarket",
"kalshi"
],
"type": "string",
"description": "exchange filter"
},
"min_liquidity": {
"type": "number",
"description": "minimum liquidity in USD (default 1000)"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"ok": {
"type": "boolean"
},
"type": "object",
"niche": {
"type": "string"
}
}
}
}
}
}
},
"delivery": {
"note": "unlike the signature -- which you verify BEFORE paying -- this one is checked afterwards, on-chain, from your own wallet",
"order": "compute -> failure gate -> verify -> settle -> deliver",
"scope": "this covers service FAILURE, not verdict quality",
"policy": "no-charge-on-service-failure",
"verify": "after a request of yours FAILS, check your own wallet on Base: no USDC settlement to our payTo will exist for it. If we had charged you, the transfer would be public and permanent",
"behaviour": "if the service FAILS (invalid input, timeout, stale cache, withdrawn product, malformed output) you receive 402 and are NOT charged"
},
"signature": {
"alg": "ed25519",
"canon": "json:sort_keys+separators(,:)+ensure_ascii+utf8",
"verify": "recompute canon from envelope.result, then VerifyKey(bytes.fromhex(pubkey)).verify(canon, bytes.fromhex(sig)) -- no name to trust, verify the signature yourself",
"jwksUrl": "https://api.hergertsynthora.com/.well-known/jwks.json",
"envelope": "{result, attestation:{alg,pubkey,sig,canon}}",
"sigEncoding": "hex(64B raw)",
"publicKeyUrl": "https://api.hergertsynthora.com/pubkey"
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.05USDC≈ $0.05 USD
on Base · exact scheme
Pay 0.05 USDC on Base to 0x1080…27dE0. The signed payment is good for 5 minutes.
- Paid to
- 0x1080…27dE0
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 50000 smallest units
- Buys
- SYNTHORA prediction-markets: top prediction markets from Polymarket and Kalshi — implied probability, bid-ask spread, liquidity, volume, open interest and freshness seal (UTC timestamp). Filter with {"limit": N, "source": "all|polymarket|kalshi", "min_liquidity": usd}. For autonomous trading, political-risk and allocation agents. $0.05 USDC via x402 on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://api.hergertsynthora.com/v1/prediction-markets",
"description": "SYNTHORA prediction-markets: top prediction markets from Polymarket and Kalshi — implied probability, bid-ask spread, liquidity, volume, open interest and freshness seal (UTC timestamp). Filter with {\"limit\": N, \"source\": \"all|polymarket|kalshi\", \"min_liquidity\": usd}. For autonomous trading, political-risk and allocation agents. $0.05 USDC via x402 on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"limit": 10,
"source": "all",
"min_liquidity": 1000
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"niche": "prediction_markets",
"result": {
"count": 1,
"source": "all",
"markets": [
{
"id": "559651",
"spread": 0.01,
"end_date": "2026-12-31T00:00:00Z",
"exchange": "polymarket",
"question": "Xi Jinping out before 2027?",
"volume_usd": 1234567.89,
"liquidity_usd": 278050.28,
"probability_yes": 0.05
}
],
"freshness_utc": "2026-08-07T12:00:00Z",
"total_liquidity_usd": 278050.28
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [],
"properties": {
"limit": {
"type": "integer",
"description": "max markets to return (1-50, default 10)"
},
"source": {
"enum": [
"all",
"polymarket",
"kalshi"
],
"type": "string",
"description": "exchange filter"
},
"min_liquidity": {
"type": "number",
"description": "minimum liquidity in USD (default 1000)"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"ok": {
"type": "boolean"
},
"type": "object",
"niche": {
"type": "string"
}
}
}
}
}
}
},
"delivery": {
"note": "unlike the signature -- which you verify BEFORE paying -- this one is checked afterwards, on-chain, from your own wallet",
"order": "compute -> failure gate -> verify -> settle -> deliver",
"scope": "this covers service FAILURE, not verdict quality",
"policy": "no-charge-on-service-failure",
"verify": "after a request of yours FAILS, check your own wallet on Base: no USDC settlement to our payTo will exist for it. If we had charged you, the transfer would be public and permanent",
"behaviour": "if the service FAILS (invalid input, timeout, stale cache, withdrawn product, malformed output) you receive 402 and are NOT charged"
},
"signature": {
"alg": "ed25519",
"canon": "json:sort_keys+separators(,:)+ensure_ascii+utf8",
"verify": "recompute canon from envelope.result, then VerifyKey(bytes.fromhex(pubkey)).verify(canon, bytes.fromhex(sig)) -- no name to trust, verify the signature yourself",
"jwksUrl": "https://api.hergertsynthora.com/.well-known/jwks.json",
"envelope": "{result, attestation:{alg,pubkey,sig,canon}}",
"sigEncoding": "hex(64B raw)",
"publicKeyUrl": "https://api.hergertsynthora.com/pubkey"
}
}Provenance
- Seen in the source catalog
- 2026-08-12 22:53Z
- Last indexed by Roundhouse
- 2026-09-11 22:31Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 12:15Z
- 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. 19 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 SYNTHORA 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=SYNTHORA' 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.hergertsynthora.com/v1/prediction-markets, 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.