# Annalist AI Model Price & Availability Changes Feed

> Annalist AI Model Price & Availability Changes Feed is a paid API for AI agents from api.annalist.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).

Returns a chronological feed of recent changes to AI model pricing and availability across providers, including price cuts/raises, new/removed models, context-window updates, and deprecation dates, sourced daily from LiteLLM's open price file.

## Facts

- Endpoint: GET https://api.annalist.dev/v1/ai/changes?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/annalist-ai-model-price-availability-changes-feed-22a00658
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CAsPSggMDCRieEWKuZ-E5

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 annalist-ai-model-price-availability-changes-feed-22a00658
```

Example prompt: What AI model price changes happened across all providers in the last 14 days? I want to see any cuts, raises, new models, removals, and context-window updates, newest first.

## When to prefer this

Choose this endpoint when you need a structured, signed, up-to-date changelog of AI model pricing and availability changes — especially for cost monitoring, deprecation tracking, or model discovery workflows. Prefer it over scraping provider docs or querying static price tables when you need change deltas (what changed and when) rather than a full current price snapshot.

## Known failure modes

- Invalid 'days' value outside 1-90 range returns an error
- Unknown or misspelled provider/model name may return an empty result set
- Payment failure via x402 protocol blocks access
- Stale data if LiteLLM upstream file has not yet been ingested for the current day

## How this service works

Recent changes to AI model prices and availability across providers, newest first: price cuts and raises per field (with the change), models added and removed, context-window changes and deprecation dates, for the last 1 to 90 days, optionally by provider or model name. Source: LiteLLM's open price file (MIT), recorded daily. Signed.

## Output

A signed, time-ordered list of AI model changes for the requested period, including: per-field price changes (input, output, cache, batch costs) with before/after values, models added or removed, context-window size changes, and deprecation dates. Optionally filtered by provider or model name. Data is sourced daily from LiteLLM's open price file and cryptographically signed.

## 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",
     "properties": {
      "days": {
       "type": "string"
      },
      "model": {
       "type": "string"
      },
      "provider": {
       "type": "string"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/annalist-ai-model-price-availability-changes-feed-22a00658/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.annalist.dev](https://www.zero.xyz/host/api.annalist.dev/llms.txt)