coord.taifoon.dev
No description published for this endpoint.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"ok": false,
"code": "payment_required",
"hint": "pay 0.001 USDC with x402 and send the same request again with the PAYMENT-SIGNATURE (or X-PAYMENT) header; the answer is checked before you are charged",
"x402": {
"error": "Payment Required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"amount": "1000",
"scheme": "exact",
"network": "eip155:42161",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "USDC",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"amount": "1000",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
"extra": {
"name": "Global Dollar",
"version": "1"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"amount": "1000",
"scheme": "exact",
"network": "eip155:4663",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
"extra": {
"name": "USDC",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"amount": "1000",
"scheme": "exact",
"network": "eip155:143",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "F742C4VfFLQ9zRQyithoj5229ZgtX2WqKCSFKgH2EThq"
},
"payTo": "GvwY5YcB7NqU8DMENC5A5fGKp2SDvs4Bx3r5Yu4YHLqZ",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"tags": [
"inference",
"metered"
],
"iconUrl": "https://www.taifoon.io/apple-touch-icon.png",
"mimeType": "application/json",
"description": "OpenAI-compatible chat completion on NVIDIA Nemotron-3-Nano-4B (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16, base weights), a small open model served from Taifoon's own GPU: short chat, text and arithmetic, not facts about recent technology. 0.001 USDC per request of up to 5,000 tokens (prompt chars/4 + max_tokens, max_tokens ≤ 700). Send { messages, max_tokens }. The answer is checked before you are charged: a failed answer is not charged.",
"serviceName": "Taifoon"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"model": "nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16",
"messages": [
{
"role": "user",
"content": "What is 17 multiplied by 24? Show the calculation briefly."
}
],
"max_tokens": 128
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"id": "chatcmpl-gpu_…",
"model": "nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16",
"usage": {
"total_tokens": 28,
"prompt_tokens": 14,
"completion_tokens": 14
},
"object": "chat.completion",
"choices": [
{
"index": 0,
"message": {
"role": "assistant",
"content": "17 × 24 = 408 (17 × 20 = 340; 17 × 4 = 68; 340 + 68 = 408)."
},
"finish_reason": "stop"
}
],
"created": 1791763200
}
}
},
"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": [
"messages"
],
"properties": {
"model": {
"type": "string",
"description": "optional; the answer names the model that served it (nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16)"
},
"messages": {
"type": "array",
"items": {
"type": "object",
"required": [
"role",
"content"
],
"properties": {
"role": {
"enum": [
"system",
"user",
"assistant"
],
"type": "string"
},
"content": {
"type": "string"
}
}
},
"maxItems": 32,
"minItems": 1
},
"max_tokens": {
"type": "integer",
"maximum": 700,
"minimum": 1
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"headers": {
"type": "object",
"additionalProperties": {
"type": "string"
}
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"queryParams": {
"type": "object",
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"object",
"choices",
"usage"
],
"properties": {
"id": {
"type": "string"
},
"model": {
"type": "string"
},
"usage": {
"type": "object",
"properties": {
"total_tokens": {
"type": "integer"
},
"prompt_tokens": {
"type": "integer"
},
"completion_tokens": {
"type": "integer"
}
}
},
"object": {
"type": "string",
"const": "chat.completion"
},
"choices": {
"type": "array",
"items": {
"type": "object",
"properties": {
"index": {
"type": "integer"
},
"message": {
"type": "object",
"properties": {
"role": {
"type": "string"
},
"content": {
"type": "string"
}
}
},
"finish_reason": {
"type": "string"
}
}
}
},
"created": {
"type": "integer"
}
}
}
}
}
}
}
}
},
"x402Version": 2,
"without_x402": {
"why": "x402 is settled on eip155:8453 (Base), eip155:42161 (Arbitrum One), eip155:5042 (Arc), eip155:4663 (Robinhood Chain), eip155:143 (Monad), solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp (Solana): pay the entry of the network you hold the dollar token on. A key with a balance is the other way to pay, the same price on any of them.",
"direct": {
"then": "send the same request with X-API-Key: it is paid from the balance at the same price",
"quote": "GET https://www.taifoon.io/v1/access/quote?usdc=1&chainId=<id> with X-API-Key (POST /v1/register for one), then POST /v1/access/topup { tx, signature, chainId }",
"chains": [
"eip155:8453 (Base, USDC)",
"eip155:42161 (Arbitrum One, USDC)",
"eip155:5042 (Arc, USDC)",
"eip155:4663 (Robinhood Chain, USDG)",
"eip155:143 (Monad, USDC)"
],
"for_a_person": "https://www.taifoon.io/pricing"
},
"settles_x402": [
"eip155:8453",
"eip155:42161",
"eip155:5042",
"eip155:4663",
"eip155:143",
"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"
]
}
},
"error": "one inference.metered answer is 0.001 USDC for up to 5000 tokens; the answer is checked before you are charged",
"terms": {
"api": "OpenAI chat completions: { messages, max_tokens } in, { choices[0].message.content, usage } out",
"per": "request",
"unit": "spot",
"basis": "the spot list price (0.2 USDC per 1M tokens) for a request of at most 5,000 tokens (prompt chars/4 + max_tokens) is 0.001 USDC = 1,000 micro-USDC, the smallest payment a wall takes; a request over 5,000 tokens is refused before the payment, so the per-token price is never above the spot list price",
"class": "inference.metered",
"model": "nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16",
"catalogue": "https://coord.taifoon.dev/v1/products/taifoon.gpu",
"served_by": "taifoon.gpu",
"model_note": "NVIDIA Nemotron-3-Nano-4B, base weights (no LoRA), 4B parameters, served by the studio lane on the layer's own GPU",
"price_usdc": 0.001,
"lane_choice": "lane bench 2026-10-11 (venue wiring loop 2): the same 10 prompts (chat.converse, text.generate, reason.general) through every chat-capable lane on the GPU box, each answer graded by Jev RUBRIC_v2 on the calibration lane: studio 5 complete / 4 needs_review / 1 reject (mean spec_met 0.68, median 1.2 s); auditor (Qwen3.6-Solidity-27B) 3 / 5 / 2 (0.64, median 79 s, over the wall's 55 s gate timeout); wizard 2 / 1 / 7; nemotron (trading LoRA) 2 / 1 / 7",
"price_units": "1000",
"max_new_tokens": 700,
"max_tokens_per_request": 5000
},
"next_step": {
"why": "pay 0.001 USDC with x402 and send the same request again with the PAYMENT-SIGNATURE (or X-PAYMENT) header; the answer is checked before you are charged",
"also": [
{
"why": "many calls: a key with a balance pays the GPU per token at the catalogue price (spot 0.2 USDC per 1M tokens)",
"http": {
"url": "https://coord.taifoon.dev/v1/register",
"method": "POST"
},
"action": "use_instead"
}
],
"http": {
"url": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"body": {
"model": "nvidia/NVIDIA-Nemotron-3-Nano-4B-BF16",
"messages": [
{
"role": "user",
"content": "What is 17 multiplied by 24? Show the calculation briefly."
}
],
"max_tokens": 128
},
"header": "PAYMENT-SIGNATURE",
"method": "POST"
},
"price": {
"per": "request",
"chain": 8453,
"amount": "0.001",
"currency": "USDC"
},
"action": "retry",
"evaluator": "/v1/judge/evaluator"
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.001 USDC on Base to 0x3574…14f5b. The signed payment is good for 5 minutes.
- Paid to
- 0x3574…14f5b
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
- Buys
- OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…
- Returns
- application/json
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x3574…14f5b
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
- Buys
- OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…
- Returns
- application/json
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x3574…14f5b
- Token contract
- 0x3600…00000
- Payment window
- 5 minutes
- Buys
- OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…
- Returns
- application/json
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x3574…14f5b
- Token contract
- 0x5fc5…1d168
- Payment window
- 5 minutes
- Buys
- OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…
- Returns
- application/json
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x3574…14f5b
- Token contract
- 0x7547…fb603
- Payment window
- 5 minutes
- Buys
- OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…
- Returns
- application/json
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- GQcEn5…qhQVD
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
- Buys
- OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"scheme": "exact",
"network": "eip155:42161",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3600000000000000000000000000000000000000",
"extra": {
"name": "USDC",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"scheme": "exact",
"network": "eip155:5042",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
"extra": {
"name": "Global Dollar",
"version": "1"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"scheme": "exact",
"network": "eip155:4663",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "0x754704Bc059F8C67012fEd69BC8A327a5aafb603",
"extra": {
"name": "USDC",
"version": "2"
},
"payTo": "0x3574999dd4c96eB73Bd6e11D4177010C83E14f5b",
"scheme": "exact",
"network": "eip155:143",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "F742C4VfFLQ9zRQyithoj5229ZgtX2WqKCSFKgH2EThq"
},
"payTo": "GQcEn5pLcweo7qaiy3rDdsiUPiygygmFBaixNtNqhQVD",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"mimeType": "application/json",
"resource": "https://coord.taifoon.dev/v1/x402/class/inference.metered",
"description": "OpenAI-compatible chat completion on 15 models: name one in `model` (meta-llama/Meta-Llama-3.1-8B-Instruct, deepseek-ai/DeepSeek-V4-Flash, deepseek-v4-flash, openai/gpt-oss-120b, openai-gpt-oss-120b,…",
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
}
]Provenance
- Seen in the source catalog
- 2026-10-22 16:23Z
- Last indexed by Roundhouse
- 2026-10-22 16:46Z
- Last enriched (probe, favicon, geo)
- 2026-10-14 10:16Z
- x402 version
- 1
- 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. 20 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
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Using Roundhouse, look up the x402 service coord.taifoon.dev 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=coord.taifoon.dev' 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://coord.taifoon.dev/v1/x402/class/inference.metered, 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.