# tokenplans.dev Changelog – Full AI Coding Plan History

> tokenplans.dev Changelog – Full AI Coding Plan History is a paid API for AI agents from api.tokenplans.dev, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Returns an append-only JSON ledger of every value-relevant change to tracked AI coding subscription plans, including price moves, usage-ceiling changes, rate-limit changes, model additions/removals, plan launches/discontinuations, and policy changes, each entry dated with old/new values and source URL.

## Facts

- Endpoint: GET https://api.tokenplans.dev/changelog/full
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tokenplans-dev-changelog-full-ai-coding-plan-history-fd598c4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PBHP7pZ3-ZlJaY1kEuc7p

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 tokenplans-dev-changelog-full-ai-coding-plan-history-fd598c4e
```

Example prompt: Pull the full changelog of AI coding plan changes from tokenplans.dev so I can see every price move, usage-ceiling change, and model addition or removal across all tracked providers, with dates and source links.

## When to prefer this

Use this endpoint when you need a complete, dated audit trail of how AI coding plan value has changed over time — including price, limits, models, and policies — rather than just current plan snapshots. Prefer it over the catalog endpoint when historical change tracking, trend analysis, or policy auditing is the goal. Ideal for agents that need to compare plan value across time periods or detect when a subscriber-affecting change occurred.

## Known failure modes

- Payment failure (x402 protocol error) if USDC payment is not properly submitted
- HTTP 402 if payment header is missing or malformed
- HTTP 500 if the upstream changelog data is unavailable
- Empty or stale changelog if no new changes have been recorded recently
- Incomplete entries for providers with unverified data

## How this service works

Append-only JSON ledger of every value-relevant change to tracked AI coding plans: price moves, usage-ceiling and rate-limit changes, model additions and removals, plan launches and discontinuations, subscriber-affecting policy changes. Each entry dated, with old/new values, source URL, and verification date. Use it to track how plan value shifts over time.

## Output

A JSON array of append-only changelog entries, each containing: provider name, plan name, change type (e.g. price move, rate-limit change, model addition, plan launch/discontinuation, policy change), old value, new value, effective/entry date, source URL, and verification date. Covers all tracked AI coding subscription providers (28+).

## 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": {}
    }
   },
   "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/tokenplans-dev-changelog-full-ai-coding-plan-history-fd598c4e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.tokenplans.dev](https://www.zero.xyz/host/api.tokenplans.dev/llms.txt)