SYNTHORA
SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]} (or {"prompt":"..."}).
InferenceLiveeip155:8453Exactvia cdp
LlmInferenceOpenai-compatibleChat-completionsx402
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$6.40
Verified settled volume
357 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
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 2026-08-13 12:43Z
–
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x10800a5a5B9d72251566EC651E862A8b4B427dE0The wallet the 402 directs payment to. Its full payment record 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.
Recent payments · which agents last used it
Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.
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": "5000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://api.hergertsynthora.com/v1/llm-fast",
"description": "SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {\"messages\":[{\"role\":\"user\",\"content\":\"...\"}]} (or {\"prompt\":\"...\"}).",
"maxAmountRequired": "5000",
"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/llm-fast",
"tags": [
"llm",
"inference",
"openai-compatible",
"chat-completions",
"x402",
"usdc"
],
"iconUrl": "https://api.hergertsynthora.com/icon.svg",
"mimeType": "application/json",
"description": "SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {\"messages\":[{\"role\":\"user\",\"content\":\"...\"}]} (or {\"prompt\":\"...\"}).",
"serviceName": "SYNTHORA"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"model": "llm-fast",
"messages": [
{
"role": "user",
"content": "Say hello in one word"
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"niche": "llm_fast",
"result": {},
"receipt": {
"alg": "ed25519"
}
}
}
},
"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",
"anyOf": [
{
"required": [
"messages"
]
},
{
"required": [
"prompt"
]
}
],
"properties": {
"model": {
"type": "string",
"description": "Etiqueta aceptada; el tier fija el modelo real"
},
"prompt": {
"type": "string",
"description": "Atajo sin messages"
},
"system": {
"type": "string",
"description": "System prompt opcional (con prompt)"
},
"messages": {
"type": "array",
"items": {
"type": "object"
},
"description": "OpenAI chat messages"
},
"max_tokens": {
"type": "integer",
"description": "Max output tokens (default 256, cap 1024)"
},
"temperature": {
"type": "number"
}
}
},
"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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x1080…27dE0. The signed payment is good for 5 minutes.
- Paid to
- 0x1080…27dE0
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
- Buys
- SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]} (or {"prompt":"..."}).
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x10800a5a5B9d72251566EC651E862A8b4B427dE0",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://llm-fast.hergertsynthora.com/v1/chat/completions",
"description": "SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {\"messages\":[{\"role\":\"user\",\"content\":\"...\"}]} (or {\"prompt\":\"...\"}).",
"maxAmountRequired": "5000",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"model": "llm-fast",
"messages": [
{
"role": "user",
"content": "Say hello in one word"
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"niche": "llm_fast",
"result": {},
"receipt": {}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"anyOf": [
{
"required": [
"messages"
]
},
{
"required": [
"prompt"
]
}
],
"properties": {
"model": {
"type": "string",
"description": "Etiqueta aceptada; el tier fija el modelo real"
},
"prompt": {
"type": "string",
"description": "Atajo sin messages"
},
"system": {
"type": "string",
"description": "System prompt opcional (con prompt)"
},
"messages": {
"type": "array",
"items": {
"type": "object"
},
"description": "OpenAI chat messages"
},
"max_tokens": {
"type": "integer",
"description": "Max output tokens (default 256, cap 1024)"
},
"temperature": {
"type": "number"
}
}
},
"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
- 2026-08-13 12:43Z
- Last indexed by Roundhouse
- 2026-09-12 12:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-24 13:15Z
- 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
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. 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://llm-fast.hergertsynthora.com/v1/chat/completions, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.