Tarnak x402 Toolkit
payment-ready until 2026-11-11
Keyless pay-per-call APIs for AI agents on Base mainnet.
Call it x402 v2
x402 v2
- Base URL
- https://api.capousd-student-tools.me
- Payment
- x402 v2, header channel
$ curl -i 'https://api.capousd-student-tools.me/v1/gas' An unpaid request returns HTTP 402 with the payment terms. Sign a payment authorization, then retry with the PAYMENT-SIGNATURE header.
Endpoints 12 paid routes on api.capousd-student-tools.me
POST/v1/extract Base$0.004since 11-04
GET/v1/gas Base$0.002since 11-04
GET/v1/gpu/prices Base$0.01since 11-04
GET/v1/gpu/report Base$0.10since 11-04
GET/v1/markdown Base$0.004since 11-04
GET/v1/providers/rank Base$0.01since 11-04
POST/v1/repair Base$0.005since 11-04
GET/v1/services Base$0.002since 11-04
4 more in Example 402 response
Prices as captured in the 402 response: median $0.004 across the 12 endpoints, unchanged since first capture.
Example 402 response
Endpoints and prices
| Method | Path | Description | Price | Network | Asset | 402 channel | Captured |
|---|---|---|---|---|---|---|---|
| POST | / | Turn a URL or raw HTML into clean markdown, title and meta for LLM ingestion. | $0.004 | Base | USDC | header | since 11-04 |
| GET | / | Get the current gas price on Base mainnet: base fee, priority fee and suggested max fee in gwei from a live RPC. Use when an agent needs a Base gas estimate before sending a transaction. $0.002 per call in USDC on Base via x402, no API key. | $0.002 | Base | USDC | header | since 11-04 |
| GET | / | Compare GPU rental prices and find the cheapest H100, A100 or RTX rental per hour: a GPU rental comparison across DePIN networks covering decentralized GPU rental, H100 vs A100 cost, GPU cloud pricing and AI compute cost per hour. Use before renting AI compute or choosing the cheapest A100/H100. GET ?model=A100 (or H100), no API key. $0.01 per call in USDC on Base via x402. | $0.01 | Base | USDC | header | since 11-04 |
| GET | / | Decision-ready GPU rental cost report for 24-720 GPU-hours. Avoid paying $30 more for a 24h H100 rental. Compare spreads, uptime, and get a rent/hold decision. Returns cheapest and recommended A100/H100/RTX offers, price spread, estimated cost at your hours, 7-day history and a rent/don't-rent call - not just a price list. GET ?model=A100&hours=24, optional compare=H100 and format=markdown; $0.10 per call in USDC on Base via x402, no API key. | $0.10 | Base | USDC | header | since 11-04 |
| GET | / | URL to markdown: fetch a public URL (or raw HTML) and convert it to clean markdown, title and meta for LLM ingestion, RAG pipelines and agent browsing. GET with ?url= so an agent can call it mid-task without a request body. $0.004 per call in USDC on Base via x402, no API key. | $0.004 | Base | USDC | header | since 11-04 |
| GET | / | Compare DePIN compute providers and DePIN compute cost: a GPU provider comparison ranking H100/A100/RTX rental providers by uptime, price and network. Use when choosing a reliable DePIN GPU provider or comparing decentralized GPU rental options; for latency-sensitive placement, compare provider uptime and network before renting. $0.01 per call in USDC on Base via x402, no API key. | $0.01 | Base | USDC | header | since 11-04 |
| POST | / | Repair and validate malformed JSON from LLM output; return the parsed value. | $0.005 | Base | USDC | header | since 11-04 |
| GET | / | Find x402-payable DePIN and data services by task: an x402 service directory to list DePIN services and agent-buyable APIs with price, network and category. Use when an agent needs a service catalog or a cheaper data source. $0.002 per call in USDC on Base via x402, no API key. | $0.002 | Base | USDC | header | since 11-04 |
| POST | / | Text statistics, keyword extraction, sentiment and chunk count for RAG pipelines. | $0.003 | Base | USDC | header | since 11-04 |
| GET | / | Focused rug-pull and honeypot risk report for a token contract: is it a honeypot, can holders sell, mintable/hidden owner flags, buy and sell tax, top-10 holder concentration, blockers and warnings. No API key, no account. $0.004 per call in USDC on Base via x402 (eip155:8453). | $0.004 | Base | USDC | header | since 11-04 |
| GET | / | Should your agent buy this token? Keyless token risk verdict: honeypot check, mintable, hidden owner, buy/sell tax, top-10 holder concentration (GoPlus) plus price, liquidity and 24h volume (DexScreener) -> avoid|caution|ok|unknown. Rug-check a memecoin or new token before trading it. Free sample: GET /v1/token/verdict/free (10 calls per IP per day). $0.02 per call in USDC on Base via x402 (eip155:8453). | $0.02 | Base | USDC | header | since 11-04 |
| GET | / | sha256 hash, slugify, base64 and uuid generation for one string. | $0.001 | Base | USDC | header | since 11-04 |
Payment evidence
402 payload captured at . Check evidence JSON · Measurement methodology.
First of 12 payloads captured by the monitor.
184 lines, scroll inside
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/token/verdict",
"tags": [
"honeypot",
"rugcheck",
"token",
"security",
"risk",
"x402",
"crypto",
"defi",
"base",
"goplus",
"dexscreener",
"memecoin"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Should your agent buy this token? Keyless token risk verdict: honeypot check, mintable, hidden owner, buy/sell tax, top-10 holder concentration (GoPlus) plus price, liquidity and 24h volume (DexScreener) -> avoid|caution|ok|unknown. Rug-check a memecoin or new token before trading it. Free sample: GET /v1/token/verdict/free (10 calls per IP per day). $0.02 per call in USDC on Base via x402 (eip155:8453).",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
},
"output": {
"type": "json",
"example": {
"ts": "2026-10-27T00:00:00Z",
"name": "Degen",
"chain": "base",
"notes": [
"GoPlus record incomplete; risk_level unknown",
"established market (liquidity >= $1M) but incomplete security record"
],
"taxes": {
"buy_pct": 0,
"sell_pct": 0
},
"market": {
"dex": "aerodrome-base",
"url": "https://dexscreener.com/base/0x...",
"pair": "0x...pair-address",
"fdv_usd": 1420000,
"price_usd": 0.0009237,
"price_pair": "DEGEN/USDC",
"liquidity_usd": 262058,
"market_cap_usd": 1280000,
"price_inverted": false,
"volume_24h_usd": 123456
},
"symbol": "DEGEN",
"address": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed",
"holders": {
"count": 101797,
"top10_pct": 62.7
},
"sources": [
"goplus",
"dexscreener"
],
"verdict": "caution",
"blockers": [],
"degraded": false,
"warnings": [
"mintable",
"lp_not_locked"
],
"narrative": "DEGEN carries unknown contract risk, and the rules-based verdict is caution. Soft warnings include mintable and lp_not_locked. The deepest pool holds $262.1K of liquidity with $123.5K in 24-hour volume.",
"confidence": "low",
"pair_count": 42,
"risk_level": "unknown",
"risk_score": 65,
"narrative_model": "huihui_ai/qwen2.5-abliterate:latest",
"narrative_source": "ollama"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"chain": {
"enum": [
"base",
"ethereum",
"polygon",
"arbitrum",
"optimism",
"bsc",
"avalanche",
"solana"
],
"type": "string",
"default": "base",
"description": "Chain the token contract lives on."
},
"token": {
"type": "string",
"description": "Alias for address."
},
"address": {
"type": "string",
"maxLength": 44,
"minLength": 32,
"description": "Token contract address (EVM 0x... or Solana base58)."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
} Other captured 402 responses (11)
Captured payload 2 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/token/risk",
"tags": [
"honeypot",
"rugcheck",
"token",
"risk",
"security",
"x402",
"crypto",
"defi",
"base",
"buy tax",
"sell tax"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Focused rug-pull and honeypot risk report for a token contract: is it a honeypot, can holders sell, mintable/hidden owner flags, buy and sell tax, top-10 holder concentration, blockers and warnings. No API key, no account. $0.004 per call in USDC on Base via x402 (eip155:8453).",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"chain": "base",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
},
"output": {
"type": "json",
"example": {
"ts": "2026-10-27T00:00:00Z",
"name": "Degen",
"chain": "base",
"symbol": "DEGEN",
"address": "0x4ed4E862860beD51a9570b96d89aF5E1B0Efefed",
"holders": 101797,
"sources": [
"goplus",
"dexscreener"
],
"verdict": "caution",
"blockers": [],
"degraded": false,
"honeypot": false,
"warnings": [
"mintable",
"lp_not_locked"
],
"risk_level": "unknown",
"buy_tax_pct": 0,
"sell_tax_pct": 0,
"top10_holders_pct": 62.7
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"chain": {
"enum": [
"base",
"ethereum",
"polygon",
"arbitrum",
"optimism",
"bsc",
"avalanche",
"solana"
],
"type": "string",
"default": "base",
"description": "Chain the token contract lives on."
},
"token": {
"type": "string",
"description": "Alias for address."
},
"address": {
"type": "string",
"maxLength": 44,
"minLength": 32,
"description": "Token contract address (EVM 0x... or Solana base58)."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 3 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/gas",
"tags": [
"gas price on base",
"base gas",
"gas",
"base",
"gwei",
"fee",
"eip155:8453",
"transaction",
"rpc"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Get the current gas price on Base mainnet: base fee, priority fee and suggested max fee in gwei from a live RPC. Use when an agent needs a Base gas estimate before sending a transaction. $0.002 per call in USDC on Base via x402, no API key.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"ts": "2026-10-27T00:00:00Z",
"block": 53184656,
"chain": "base",
"network": "eip155:8453",
"base_fee_gwei": 0.0012,
"gas_price_gwei": 0.002,
"priority_fee_gwei": 0.0008,
"suggested_max_fee_gwei": 0.002
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 4 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "2000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/services",
"tags": [
"x402 directory",
"depin services",
"x402 apis",
"depin",
"catalog",
"services",
"discovery"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Find x402-payable DePIN and data services by task: an x402 service directory to list DePIN services and agent-buyable APIs with price, network and category. Use when an agent needs a service catalog or a cheaper data source. $0.002 per call in USDC on Base via x402, no API key.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"limit": 20,
"category": "compute",
"max_price": 0.01
}
},
"output": {
"type": "json",
"example": {
"count": 1,
"services": [
{
"url": "https://x-pay.example",
"slug": "x-pay",
"network": "base",
"category": "compute",
"price_usd": 0.002
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"limit": {
"type": "integer",
"default": 20,
"maximum": 100,
"minimum": 1
},
"category": {
"type": "string",
"description": "e.g. compute, storage, data."
},
"max_price": {
"type": "number",
"description": "Max USD price per call."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 5 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/gpu/prices",
"tags": [
"cheapest h100 rental",
"cheapest a100 rental",
"gpu rental comparison",
"decentralized gpu rental",
"h100 vs a100",
"rtx rental",
"ai compute cost",
"depin compute cost",
"gpu prices",
"depin",
"gpu"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Compare GPU rental prices and find the cheapest H100, A100 or RTX rental per hour: a GPU rental comparison across DePIN networks covering decentralized GPU rental, H100 vs A100 cost, GPU cloud pricing and AI compute cost per hour. Use before renting AI compute or choosing the cheapest A100/H100. GET ?model=A100 (or H100), no API key. $0.01 per call in USDC on Base via x402.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"model": "A100"
}
},
"output": {
"type": "json",
"example": {
"model": "A100",
"offers": [
{
"ts": "2026-10-27T00:00:00Z",
"network": "base",
"gpu_model": "A100",
"uptime_30d": 0.99,
"price_usd_hr": 1.2
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"model": {
"type": "string",
"description": "GPU model filter, e.g. A100."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 6 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/providers/rank",
"tags": [
"depin compute providers",
"depin compute cost",
"gpu provider comparison",
"provider uptime",
"decentralized gpu rental",
"depin",
"compute",
"ranking",
"providers",
"price"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Compare DePIN compute providers and DePIN compute cost: a GPU provider comparison ranking H100/A100/RTX rental providers by uptime, price and network. Use when choosing a reliable DePIN GPU provider or comparing decentralized GPU rental options; for latency-sensitive placement, compare provider uptime and network before renting. $0.01 per call in USDC on Base via x402, no API key.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"network": "base"
}
},
"output": {
"type": "json",
"example": {
"ranked": [
{
"id": "provider-1",
"ts": "2026-10-27T00:00:00Z",
"network": "base",
"gpu_model": "A100",
"uptime_30d": 0.99,
"price_usd_hr": 1.2
}
]
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"network": {
"type": "string",
"description": "DepIN network filter."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 7 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/gpu/report",
"tags": [
"gpu rental cost report",
"h100 cost estimate",
"gpu cost 24 hours",
"h100 vs a100 cost",
"gpu procurement decision",
"should I rent",
"gpu rental decision",
"ai compute cost",
"depin compute cost",
"gpu prices",
"gpu"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Decision-ready GPU rental cost report for 24-720 GPU-hours. Avoid paying $30 more for a 24h H100 rental. Compare spreads, uptime, and get a rent/hold decision. Returns cheapest and recommended A100/H100/RTX offers, price spread, estimated cost at your hours, 7-day history and a rent/don't-rent call - not just a price list. GET ?model=A100&hours=24, optional compare=H100 and format=markdown; $0.10 per call in USDC on Base via x402, no API key.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hours": 24,
"model": "A100"
}
},
"output": {
"type": "json",
"example": {
"as_of": "2026-10-28T15:08:03+00:00",
"hours": 24,
"model": "A100",
"history": null,
"cheapest": {
"as_of": "2026-10-28T15:08:03+00:00",
"region": "California, US",
"network": "vast.ai",
"gpu_model": "A100 SXM4",
"uptime_30d": 0.9735,
"provider_id": "vast:513108:A100 SXM4:1",
"price_usd_hr": 0.4006
},
"available": true,
"price_summary": {
"max_usd_hr": 0.6304,
"min_usd_hr": 0.4006,
"offer_count": 3,
"median_usd_hr": 0.4015
},
"recommendation": "Cheapest live offer ... confirm availability before paying.",
"report_version": 1,
"estimated_cost_usd": 9.61
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"hours": {
"type": "integer",
"default": 24,
"maximum": 720,
"minimum": 1
},
"model": {
"type": "string",
"description": "GPU model filter, e.g. A100."
},
"format": {
"enum": [
"json",
"markdown"
],
"type": "string",
"default": "json"
},
"compare": {
"type": "string",
"description": "Optional comma-separated models, e.g. H100,RTX 4090."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 8 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/util/hash",
"tags": [
"hash",
"sha256",
"base64",
"slug",
"uuid"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "sha256 hash, slugify, base64 and uuid generation for one string.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"text": "hello"
}
},
"output": {
"type": "json",
"example": {
"slug": "hello",
"uuid": "0b6a0f0e-0000-4000-8000-000000000000",
"base64": "aGVsbG8=",
"sha256": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"text"
],
"properties": {
"text": {
"type": "string",
"minLength": 1
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 9 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/markdown",
"tags": [
"url to markdown",
"markdown",
"html",
"extract",
"llm",
"rag",
"content",
"web"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "URL to markdown: fetch a public URL (or raw HTML) and convert it to clean markdown, title and meta for LLM ingestion, RAG pipelines and agent browsing. GET with ?url= so an agent can call it mid-task without a request body. $0.004 per call in USDC on Base via x402, no API key.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"url": "https://example.com/article"
}
},
"output": {
"type": "json",
"example": {
"url": "https://example.com/article",
"meta": {
"author": "Example",
"description": "Example description"
},
"title": "Example article",
"markdown": "# Example article\n\nCleaned body text."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "URL to fetch and convert."
},
"html": {
"type": "string",
"description": "Raw HTML instead of a URL."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 10 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "4000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/extract",
"tags": [
"markdown",
"html",
"extract",
"scrape",
"llm",
"content",
"web"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Turn a URL or raw HTML into clean markdown, title and meta for LLM ingestion.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://example.com/article"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"url": "https://example.com/article",
"meta": {
"author": "Example",
"description": "Example description"
},
"title": "Example article",
"markdown": "# Example article\n\nCleaned body text."
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"properties": {
"url": {
"type": "string",
"description": "URL to fetch and convert."
},
"html": {
"type": "string",
"description": "Raw HTML instead of a URL."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 11 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/repair",
"tags": [
"json",
"repair",
"parse",
"llm",
"structured",
"output"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Repair and validate malformed JSON from LLM output; return the parsed value.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"json": "{\"a\": 1,}"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"ok": true,
"error": null,
"value": {
"a": 1
},
"applied": [
"removed_trailing_comma"
],
"repaired": true
}
}
},
"schema": {
"type": "object",
"$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": [
"json"
],
"properties": {
"json": {
"type": "string",
"description": "Malformed JSON text."
}
},
"additionalProperties": false
},
"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"
}
}
}
}
}
}
},
"x402Version": 2
}Captured payload 12 of 12
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x515093899dCC7Acc6d24fe543EE017a5c25695C9",
"amount": "3000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://api.capousd-student-tools.me/v1/text",
"tags": [
"text",
"keywords",
"sentiment",
"nlp",
"summarize",
"chunk",
"stats"
],
"iconUrl": "https://api.capousd-student-tools.me/icon.svg",
"mimeType": "application/json",
"description": "Text statistics, keyword extraction, sentiment and chunk count for RAG pipelines.",
"serviceName": "Tarnak x402 Toolkit"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"text": "Base is a fast L2 built on the OP Stack.",
"keywords": 8,
"chunk_size": 1200
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"stats": {
"chars": 43,
"lines": 1,
"words": 9
},
"chunks": 1,
"keywords": [
"base",
"l2",
"op",
"stack"
],
"sentiment": "neutral"
}
}
},
"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": [
"text"
],
"properties": {
"text": {
"type": "string",
"minLength": 1
},
"keywords": {
"type": "integer",
"default": 8
},
"chunk_size": {
"type": "integer",
"default": 1200
}
},
"additionalProperties": false
},
"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"
}
}
}
}
}
}
},
"x402Version": 2
}Can I trust it score from our own monitoring
score from our own monitoring
99/100 Strong
#3 of 462 in Data. Bands: strong 93+, solid 75+, mixed 55+, weak below 55.
- Reliability
- 100% uptime since 11-04
- Compliance
- A 14/14 checks pass
- Price
- $0.001 to $0.10 p9 in Data
- Risk
- clean no risk flag
- Traction
- ---
14/14 compliance checks
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
402 terms unchanged since 2026-11-04. Last up 2026-11-04.
── Site signals
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
How the score works
What the score read on this service: status online, 100% uptime, latest daily rollup (no 30d window yet), 212ms response p95, x402 compliance 14 of 14, $0.001 price against the category. Each of those is measured, and each is published in full below.
The score comes from our own monitoring, never from reviews, operator claims, or a language model: reliability, x402 compliance, price against the category, a deterministic risk flag, and a small on-chain traction term, weighted by ranking generation 3. It is not placement anyone can buy: the paid verify tier is reported beside it and is not one of its inputs. Every component below stays published and read-only.
Bands on the 0 to 100 measured score: strong at 93 and above, solid from 75, mixed from 55, weak below 55. Price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, so the score places a service in its own field.
It is a score inside Data, and only there: price and speed are scored against the whole category field, every listing in it that carries no danger flag, the scored service included, which here means 462 listings, this one among them: the same 462 the position above is counted against. When the two differ, the field is the wider one, because a listing we have measured too little of to rank still sits in the field the price and the speed are normalized over. The same service in a different field would read differently. The same engine answers GET /api/v1/best, and asked for a different pool (the whole directory, or another filter) it returns a different number for this service under this same ranking generation. Neither is more correct: they answer different questions, and the methodology states which is which.
All measured facts
What it does
Keyless pay-per-call APIs for AI agents on Base mainnet. Token risk/rug verdicts, Base gas, x402 service directory, live GPU rental prices and a decision-ready GPU cost report ($0.10): cheapest/recommended offer, price spread, cost scenarios, 7-day history and a rent/caution/hold call. USDC via x402 v2, no API key or account. Free report preview at /v1/gpu/report?model=A100&hours=24&preview=1.
Tarnak x402 Toolkit is a listed x402 Data API. Captured payment terms name Base. Monitoring and settlement figures below describe the observations available to this directory; an unpaid HTTP 402 check does not prove that a paid call will deliver.
Assessment computed at . Latest service check observed at . Service data JSON · Measurement methodology.
Page rendered at . This response time is separate from the observation and computation times attached to each measurement.
Latest endpoint observation: . Latest price capture: . Prices are recorded quotes, not a promise of availability. Token assets and payment terms are listed separately. Endpoint data JSON · Price history JSON · Measurement methodology.
Assessment computed at . Uptime uses the stated daily-rollup window; response times are in milliseconds, compliance is passed/evaluated checks, and traction is a measured settlement floor. The comparison score is out of 100 within this category. Assessment JSON · Measurement methodology.
Observed daily coverage: 2026-10-06 to 2026-11-04 UTC. Daily monitoring and settlement rollups do not expose their computation time; a bucket date is not an update timestamp. Uptime and response JSON · Volume JSON · Buyers JSON · Measurement methodology.
Ranked from the measured category pool, refreshed at most once a minute. The comparison has no persisted computation timestamp; the assessment time above belongs to this service only. Ranking API documentation · Ranking methodology.
x402 List home · Services · Data
- uptime · latest daily rollup
- -
- uptime 7d
- -
- uptime 30d
- -
- uptime 90d
- -
- response p95
- 212ms
- avg response
- 212ms
- total checks
- 1
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
- price (min)
- $0.001
- price (max)
- $0.10
- category percentile (min)
- p9 in Data
- category percentile (max)
- p71 in Data
- endpoints / prices
- 12 / 8
- model
- tiered
- stability
- 0%
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- -
- registrar
- -
- hosting
- custom
- domain created
- ---
Identity facts, not a risk score.
On-chain traction has not been assessed for this service yet.
- member since
- 2026-11-04
Recent checks
| Checked at (UTC) | Status | HTTP | Response | Endpoints |
|---|---|---|---|---|
| Online | 402 | 175ms | 12 | |
| Online | 402 | 218ms | 12 | |
| Online | 402 | 202ms | 12 | |
| Online | 402 | 249ms | 12 | |
| Online | 402 | 185ms | 12 | |
| Online | 402 | 270ms | 12 | |
| Online | 402 | 246ms | 12 | |
| Online | 402 | 212ms | 12 |
Changes0 in 30d
No changes recorded in the last 30 days.
Over time
On-chain volume
On-chain traction has not been assessed for this service yet.
Uptime no completed-day data
- Uptime
- no completed-day data
On-chain traction has not been assessed for this service yet.
More charts
Response time daily average, ms min 227ms, avg 227ms, max 227ms
10-06 to 11-04* UTC
Each series spans only the dates it has data for. Every series is also served as JSON at /api, /scores, /volume and /buyers.
Values
* today so far, partial (UTC).
The uptime summary counts completed UTC days only. The strip, readouts and table retain today's partial reading.
Assessment history last recorded at . Each UTC day uses its last recorded run; missing readings stay unmeasured. Assessment history JSON · Measurement methodology.
| Day | Uptime | Response | Compliance | Price percentile | Site signals |
|---|---|---|---|---|---|
| 2026-11-04* | 100% | 227.33ms | 14/14 | p9 | 3/6 |
Alternatives in Data
Imagio Relay · 57 x402 tools for agents (web-intel, trade math, infra, docs) strong 98/100 100% up 30d --- 30d
5 of 461 other ranked services in Data, ordered by the same measured score.
Own this service?
Keep this listing accurate. Ownership is proven with a domain check and every change is reviewed by hand.
Update this listingEarn the verified tier: x402list pays a real call to this endpoint and, if it delivers, the service is delivery-verified. The fee covers the cost of the probe, not the badge; there is no refund if the call does not deliver. Agent and API only, no in-browser signing. See /api.
Verify this service ($0.25)Embed a badge
HTML
<a href="https://x402-list.com/services/ tarnak-x402-toolkit? utm_source=badge& utm_medium=referral& utm_campaign=embed"> <img src="https://x402-list.com/ badge/ tarnak-x402-toolkit.svg" alt="Tarnak x402 Toolkit listed on x402-list" height="28"> </a>
Markdown
[](https://x402-list.com/ services/ tarnak-x402-toolkit? utm_source=badge& utm_medium=referral& utm_campaign=embed)
HTML, live uptime variant
<a href="https://x402-list.com/services/ tarnak-x402-toolkit? utm_source=badge& utm_medium=referral& utm_campaign=embed"> <img src="https://x402-list.com/ badge/ tarnak-x402-toolkit.svg? data=uptime" alt="Tarnak x402 Toolkit uptime on x402-list" height="28"> </a>
Delisting
To request delisting, email info@x402-list.com with the service name, slug, or URL. Removal is free and does not require proof of ownership. See all free email requests.