> ## Documentation Index
> Fetch the complete documentation index at: https://data.ornn.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Get previous day's daily index

> The previous day's daily index for a GPU. Useful for day-over-day comparisons.

## Overview

The previous day's daily index for a GPU. Useful for day-over-day comparisons.


## OpenAPI

````yaml openapi.yaml GET /api/daily-index/{gpuName}/previous
openapi: 3.1.0
info:
  title: Ornn Data API
  version: 1.0.0
  description: >
    Read-only REST API for GPU and memory market data. The price index is the
    going rate of compute in USD per GPU-hour, a weighted average of all
    verified compute transactions across the market.
servers:
  - url: https://api.ornnai.com
security:
  - bearerAuth: []
tags:
  - name: Current Prices
  - name: Historical Prices
  - name: Analytics
  - name: Memory
  - name: Token Prices
  - name: Workload Cost
  - name: LLM Coding
  - name: Neo-Cloud Sites
  - name: Reference
paths:
  /api/daily-index/{gpuName}/previous:
    get:
      tags:
        - Current Prices
      summary: Get previous day's daily index
      description: >-
        The previous day's daily index for a GPU. Useful for day-over-day
        comparisons.
      parameters:
        - $ref: '#/components/parameters/gpuName'
      responses:
        '200':
          description: Previous day's daily index.
          content:
            application/json:
              example:
                success: true
                data:
                  gpu_type: H100 SXM
                  region: global
                  index_value: 2
                  date: '2026-01-01T00:00:00.000Z'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
      security: []
      x-codeSamples:
        - lang: bash
          label: cURL
          source: |
            curl "https://api.ornnai.com/api/daily-index/H100%20SXM/previous" \
              -H "Authorization: Bearer YOUR_API_KEY"
        - lang: python
          label: Python
          source: |
            import requests

            resp = requests.get(
                "https://api.ornnai.com/api/daily-index/H100 SXM/previous",
                headers={"Authorization": "Bearer YOUR_API_KEY"},
            )
        - lang: javascript
          label: JavaScript
          source: |
            const res = await fetch(
              "https://api.ornnai.com/api/daily-index/H100 SXM/previous",
              { headers: { Authorization: "Bearer YOUR_API_KEY" } },
            );
        - lang: php
          label: PHP
          source: >
            <?php

            $ch = curl_init("https://api.ornnai.com/api/daily-index/" .
            rawurlencode("H100 SXM") . "/previous");

            curl_setopt_array($ch, [
                CURLOPT_RETURNTRANSFER => true,
                CURLOPT_HTTPHEADER => ["Authorization: Bearer YOUR_API_KEY"],
            ]);

            $data = json_decode(curl_exec($ch), true);
        - lang: go
          label: Go
          source: "package main\n\nimport (\n\t\"io\"\n\t\"net/http\"\n\t\"net/url\"\n)\n\nfunc main() {\n\tendpoint := \"https://api.ornnai.com/api/daily-index/\" + url.PathEscape(\"H100 SXM\") + \"/previous\"\n\treq, _ := http.NewRequest(\"GET\", endpoint, nil)\n\treq.Header.Set(\"Authorization\", \"Bearer YOUR_API_KEY\")\n\tresp, _ := http.DefaultClient.Do(req)\n\tdefer resp.Body.Close()\n\tbody, _ := io.ReadAll(resp.Body)\n\t_ = body\n}\n"
        - lang: java
          label: Java
          source: >
            import java.net.URI;

            import java.net.http.HttpClient;

            import java.net.http.HttpRequest;

            import java.net.http.HttpResponse;


            HttpClient client = HttpClient.newHttpClient();

            HttpRequest request = HttpRequest.newBuilder(
                    URI.create("https://api.ornnai.com/api/daily-index/H100%20SXM/previous"))
                .header("Authorization", "Bearer YOUR_API_KEY")
                .build();
            HttpResponse<String> response = client.send(request,
            HttpResponse.BodyHandlers.ofString());
        - lang: ruby
          label: Ruby
          source: >
            require "net/http"

            require "json"


            uri =
            URI("https://api.ornnai.com/api/daily-index/H100%20SXM/previous")

            req = Net::HTTP::Get.new(uri)

            req["Authorization"] = "Bearer YOUR_API_KEY"

            res = Net::HTTP.start(uri.host, uri.port, use_ssl: true) { |http|
            http.request(req) }

            data = JSON.parse(res.body)
components:
  parameters:
    gpuName:
      name: gpuName
      in: path
      required: true
      description: A supported GPU model. URL-encode spaces.
      schema:
        type: string
        enum:
          - H100 SXM
          - H200
          - A100 SXM4
          - B200
          - RTX 5090
          - RTX PRO 6000 WS
        example: H100 SXM
  responses:
    BadRequest:
      description: A required parameter is missing or invalid.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: Missing, invalid, or revoked API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error: Unauthorized
            message: 'API key required. Use Authorization: Bearer YOUR_API_KEY'
    NotFound:
      description: No data found for the given parameters.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error: No data available
            message: No daily index data found for H100 SXM
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
          example: Bad request
        message:
          type: string
          example: >-
            Invalid GPU type. Allowed: H100 SXM, H200, A100 SXM4, RTX 5090,
            B200, RTX PRO 6000 WS
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key passed as a Bearer token. Create one in the dashboard.

````