# corpusAI LLM Token Price Fixing (Daily Reference Rate)

> corpusAI LLM Token Price Fixing (Daily Reference Rate) is a paid API for AI agents from cloud.trycorpus.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Returns a daily reference price (fixing) for LLM token costs by ticker, including frontier model blends and individual model input/output/blend sides.

## Facts

- Endpoint: GET https://cloud.trycorpus.ai/v1/tokens/fixing?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/corpusai-llm-token-price-fixing-daily-reference-rate-e9a496eb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KHPmTgEI16c85QZldoTM1

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability corpusai-llm-token-price-fixing-daily-reference-rate-e9a496eb
```

Example prompt: What's today's blended frontier LLM token price? Use the ticker CX.TOK.FRONTIER.BLEND and give me the fixing value and methodology.

## When to prefer this

Use this endpoint when you need a structured, daily reference rate (fixing) for LLM token prices — particularly for frontier model blends — rather than scraping vendor pricing pages. It is ideal for cost benchmarking, budget forecasting, or building cost-aware AI agents that need to compare inference costs across models or track price changes over time.

## Known failure modes

- Invalid or unrecognized ticker symbol returns an error
- Date out of available range (pre-data or future) returns no data
- Missing required 'ticker' query parameter causes a 400-style error
- x402 payment failure if USDC payment is not attached or insufficient

## How this service works

corpusAI Cloud Pricing: One day's token price fixing for a ticker such as CX.TOK.CLAUDESONNET5.IN.

## Output

Returns a JSON object with the ticker symbol, date, daily fixing value (value), number of observations (n), methodology description, optional high/low bounds, token side (IN/OUT/BLEND), basket member weights, and per-member input/output prices.

## Request schema (JSON Schema)

```json
{
 "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": [
      "ticker"
     ],
     "properties": {
      "day": {
       "type": "string",
       "format": "date",
       "description": "YYYY-MM-DD; default latest."
      },
      "ticker": {
       "type": "string",
       "examples": [
        "CX.TOK.FRONTIER.BLEND"
       ],
       "description": "CX.TOK.<MODELCODE>.IN | OUT | BLEND, or CX.TOK.FRONTIER.<side>."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "ticker",
      "day",
      "value",
      "n",
      "methodology"
     ],
     "properties": {
      "n": {
       "type": "integer"
      },
      "hi": {
       "type": "number"
      },
      "lo": {
       "type": "number"
      },
      "day": {
       "type": "string",
       "format": "date"
      },
      "side": {
       "enum": [
        "IN",
        "OUT",
        "BLEND"
       ],
       "type": "string"
      },
      "unit": {
       "type": "string"
      },
      "input": {
       "type": [
        "number",
        "null"
       ]
      },
      "model": {
       "type": "string"
      },
      "value": {
       "type": "number"
      },
      "basket": {
       "type": "array",
       "items": {
        "type": "string"
       }
      },
      "output": {
       "type": [
        "number",
        "null"
       ]
      },
      "ticker": {
       "type": "string"
      },
      "members": {
       "type": "object",
       "additionalProperties": {
        "type": "number"
       }
      },
      "methodology": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "n": 0,
  "day": "2026-01-01",
  "value": 0,
  "ticker": "string",
  "methodology": "string"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/corpusai-llm-token-price-fixing-daily-reference-rate-e9a496eb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cloud.trycorpus.ai](https://www.zero.xyz/host/cloud.trycorpus.ai/llms.txt)