# Saylor Innovations Oracle Price Feed

> Saylor Innovations Oracle Price Feed is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Returns the current on-chain Chainlink oracle price for a given asset pair (ETH/USD, BTC/USD, LINK, SOL, stablecoins, EUR) on Ethereum or Base, including update time and a staleness flag.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/oracle/price?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-oracle-price-feed-6a1681c5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dL4cE797t8QiFxjc3uv99

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 saylor-innovations-oracle-price-feed-6a1681c5
```

Example prompt: What's the current on-chain Chainlink price for ETH/USD on Ethereum — and is the feed fresh or stale?

## When to prefer this

Use this endpoint when you need tamper-resistant, on-chain oracle prices sourced directly from Chainlink data feeds rather than a centralized exchange API. Ideal for DeFi agents that need to verify whether a price feed is fresh (staleness flag + age_seconds), need the feed contract address for smart contract interactions, or need prices on both Ethereum mainnet and Base. Prefer this over CEX price endpoints when on-chain provenance and heartbeat metadata matter.

## Known failure modes

- Unsupported pair requested — returns error indicating the pair is not available, with a list of supported pairs
- Invalid chain parameter — returns error if a chain other than 'ethereum' or 'base' is specified
- Chainlink feed temporarily unreachable — may return stale data with stale:true or a fetch error
- Payment not received (x402) — returns 402 Payment Required before data is delivered
- Rate limiting or node timeout — returns a 5xx error if the on-chain RPC is congested

## How this service works

On-chain oracle price from Chainlink data feeds on Ethereum and Base for ETH, BTC, LINK, SOL, stablecoins and EUR, with update time and a staleness flag.

## Output

A JSON object containing the normalized pair name, blockchain, Chainlink feed contract address, price as a number and formatted string, decimal places, last update timestamp (UTC), age in seconds, heartbeat interval in seconds, a boolean staleness flag, round ID, answered-in-round, a list of all available pairs, a contextual note, and the data source attribution.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "pair"
     ],
     "properties": {
      "pair": {
       "type": "string",
       "description": "the feed pair such as ETH/USD, BTC/USD, USDC/USD (ETH-USD and ETHUSD also work)"
      },
      "chain": {
       "type": "string",
       "description": "optional: ethereum (default) or base"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "pair",
      "chain",
      "feed_address",
      "price",
      "price_text",
      "decimals",
      "updated_at",
      "age_seconds",
      "heartbeat_seconds",
      "stale",
      "round_id",
      "answered_in_round",
      "available_pairs",
      "note",
      "source"
     ],
     "properties": {
      "note": {
       "type": "string",
       "description": "Caveat or context for reading the result"
      },
      "pair": {
       "type": "string"
      },
      "chain": {
       "type": "string",
       "description": "Blockchain the data is for"
      },
      "price": {
       "type": "number",
       "description": "Price"
      },
      "stale": {
       "type": "boolean"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "decimals": {
       "type": "number",
       "description": "Token decimal places"
      },
      "round_id": {
       "type": "string",
       "description": "Round id identifier"
      },
      "price_text": {
       "type": "string",
       "description": "Price text"
      },
      "updated_at": {
       "type": "string",
       "description": "Updated at (UTC unless a time zone is given)"
      },
      "age_seconds": {
       "type": "number",
       "description": "Age, in seconds"
      },
      "feed_address": {
       "type": "string",
       "description": "Feed address"
      },
      "available_pairs": {
       "type": "array",
       "de
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-oracle-price-feed-6a1681c5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)