gpt-mini-api
GPT Mini API - pay per call, no API key. OpenAI-format chat completions on openai/gpt-5.4-mini, pinned to OpenAI's own OpenRouter endpoint for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout with an automatic 2nd-provider retry if the first is slow - never charged if both miss; set your client timeout to 30s. Try GET /llm/gpt-mini/sample.
InferenceLiveeip155:8453Exactvia wellknown:x402.agentindex.world
GPT Mini APIGpt apiOpenai apiPay per call llm
Calls · 30d
3→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$1.51
Verified settled volume
563 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69dThe 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.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
"amount": "5069",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://x402.agentindex.world/llm/gpt-mini",
"tags": [
"GPT Mini API",
"gpt api",
"openai api",
"pay per call llm"
],
"iconUrl": "https://x402.agentindex.world/icon.png",
"mimeType": "application/json",
"description": "GPT Mini API - pay per call, no API key. OpenAI-format chat completions on openai/gpt-5.4-mini, pinned to OpenAI's own OpenRouter endpoint for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout with an automatic 2nd-provider retry if the first is slow - never charged if both miss; set your client timeout to 30s. Try GET /llm/gpt-mini/sample.",
"serviceName": "gpt-mini-api"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"messages": [
{
"role": "user",
"content": "Summarize in one sentence: The Eiffel Tower is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It was designed by Gustave Eiffel's engineering company and built as the entrance arch for the 1889 World's Fair. Initially criticized by some of France's leading artists and intellectuals for its design, it has become a global cultural icon of France and one of the most recognizable structures in the world, attracting millions of visitors every year."
}
],
"max_tokens": 150
},
"type": "http",
"method": "GET",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"id": "gen-1790781015-abP5jUyNb5Xs9xjmdtPX",
"model": "openai/gpt-5.4-mini",
"usage": {
"cost": 0.0002505,
"total_tokens": 139,
"prompt_tokens": 100,
"completion_tokens": 39
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "The Eiffel Tower, a wrought-iron tower in Paris built for the 1889 World's Fair, evolved from a controversial design into one of the world's most iconic landmarks."
},
"finish_reason": "stop"
}
],
"created": 1790781015,
"provider": "OpenAI",
"x402_receipt": {
"upstream": "llm/gpt-mini",
"latency_ms": 1700,
"model_served": "openai/gpt-5.4-mini",
"price_paid_usdc": 0.001
}
}
}
},
"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": {
"required": [
"messages"
],
"properties": {
"messages": {
"type": "array",
"items": {
"type": "object"
},
"minItems": 1,
"description": "OpenAI-format chat messages: [{role, content}, ...]."
},
"max_tokens": {
"type": "integer",
"description": "Max completion tokens, capped at 4096 - also bounds the price ceiling."
}
}
},
"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": {
"type": "object",
"required": [
"choices",
"usage"
],
"properties": {
"id": {
"type": "string"
},
"model": {
"type": "string"
},
"usage": {
"type": "object"
},
"choices": {
"type": "array",
"items": {
"type": "object"
}
},
"x402_receipt": {
"type": "object"
}
}
}
}
}
}
}
}
},
"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.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0xb3F3…BA69d. The signed payment is good for 5 minutes.
- Paid to
- 0xb3F3…BA69d
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
"price": "from $0.001, computed from your max_tokens × model rate × 1.10",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"messages": [
{
"role": "user",
"content": "Summarize in one sentence: The Eiffel Tower is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It was designed by Gustave Eiffel's engineering company and built as the entrance arch for the 1889 World's Fair. Initially criticized by some of France's leading artists and intellectuals for its design, it has become a global cultural icon of France and one of the most recognizable structures in the world, attracting millions of visitors every year."
}
],
"max_tokens": 150
},
"type": "http",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"id": "gen-1790781015-abP5jUyNb5Xs9xjmdtPX",
"model": "openai/gpt-5.4-mini",
"usage": {
"cost": 0.0002505,
"total_tokens": 139,
"prompt_tokens": 100,
"completion_tokens": 39
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "The Eiffel Tower, a wrought-iron tower in Paris built for the 1889 World's Fair, evolved from a controversial design into one of the world's most iconic landmarks."
},
"finish_reason": "stop"
}
],
"created": 1790781015,
"provider": "OpenAI",
"x402_receipt": {
"upstream": "llm/gpt-mini",
"latency_ms": 1700,
"model_served": "openai/gpt-5.4-mini",
"price_paid_usdc": 0.001
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"required": [
"messages"
],
"properties": {
"messages": {
"type": "array",
"items": {
"type": "object"
},
"minItems": 1,
"description": "OpenAI-format chat messages: [{role, content}, ...]."
},
"max_tokens": {
"type": "integer",
"description": "Max completion tokens, capped at 4096 - also bounds the price ceiling."
}
}
},
"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": {
"type": "object",
"required": [
"choices",
"usage"
],
"properties": {
"id": {
"type": "string"
},
"model": {
"type": "string"
},
"usage": {
"type": "object"
},
"choices": {
"type": "array",
"items": {
"type": "object"
}
},
"x402_receipt": {
"type": "object"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- —
- Last indexed by Roundhouse
- 2026-10-18 13:15Z
- Last enriched (probe, favicon, geo)
- 2026-10-02 23:15Z
- x402 version
- —
- 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. 32 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 gpt-mini-api 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=gpt-mini-api' 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://x402.agentindex.world/llm/gpt-mini, 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.