# JSON pointer list

`json-pointer-list` · version 1.0.0 · JSON & JSONL · free, no key needed

List RFC 6901 pointers to every reachable JSON node, root first.

**Use when you need to: json pointer list · list json pointers · enumerate json pointers.**

## Supported

- json pointer list
- list json pointers
- enumerate json pointers

## Not supported

- json path
- regex
- prototype walk

## Behavior

- Accept only JSON values: null, boolean, finite number, string, array, and plain objects.
- Reject NaN, Infinity, -Infinity, undefined, BigInt, functions, symbols, Date, Map, Set, RegExp, boxed primitives, Buffer, and sparse holes.
- Canonicalize -0 to 0.
- Objects may have null or Object.prototype; use own enumerable string keys only.
- Treat __proto__, constructor, and toString as ordinary own keys. Never mutate Object.prototype.
- Output objects must be Object.create(null). Deep-clone all returned JSON values.
- Bound walk: max depth 32, max nodes 10000, max UTF-8 JSON bytes 250KiB of the input document string if provided as text; when json is already a value, bound the walked node count and depth.
- Preorder walk: emit the pointer for the current node, then object keys in lexicographic UTF-16 order, then array indexes 0..n-1.
- Root pointer is "". Object key tokens are escaped (~ -> ~0, / -> ~1).
- Include both intermediate and leaf nodes. Max 10000 pointers (same as node bound).

## Input

- `json` (any JSON value, required)

## Output

- `pointers` (array of string, required): max items 10000

## Limits

- max json depth: 32
- max json nodes: 10000

## Example

Request input:

```json
{
  "json": {
    "b": 1,
    "a": [
      false
    ]
  }
}
```

Response:

```json
{
  "result": {
    "pointers": [
      "",
      "/a",
      "/a/0",
      "/b"
    ]
  }
}
```

## How to call it

### MCP

Connect `https://computefirst.net/mcp` ([setup](/docs#connect)), then call `execute` with:

```json
{
  "id": "json-pointer-list",
  "version": "1.0.0",
  "input": {
    "json": {
      "b": 1,
      "a": [
        false
      ]
    }
  }
}
```

### HTTP (no key)

```sh
curl -X POST https://computefirst.net/v1/tools/json-pointer-list/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"json":{"b":1,"a":[false]}}'
```

The machine-readable contract is at [/v1/tools/json-pointer-list/versions/1.0.0](/v1/tools/json-pointer-list/versions/1.0.0).

### CLI

```sh
node cli.mjs run json-pointer-list 1.0.0 --input input.json --base-url https://computefirst.net
```

Get the client at [/clients/cli/](/clients/cli/).

## Related tools

- [JSON flatten](/tools/json-flatten): Flatten a JSON value into a null-prototype map keyed by RFC 6901 JSON Pointers.
- [JSON unflatten](/tools/json-unflatten): Reconstruct a JSON value from a map of RFC 6901 JSON Pointers to leaves.
- [JSON omit pointers](/tools/json-omit-pointers): Deep-clone JSON and delete values at explicit RFC 6901 pointers.
- [JSON pick pointers](/tools/json-pick-pointers): Pick cloned JSON values at explicit RFC 6901 pointers into a null-prototype map.
- [JSON pointer get](/tools/json-pointer-get): Return the cloned JSON value at an RFC 6901 pointer.
- [JSON pointer has](/tools/json-pointer-has): Return whether an RFC 6901 pointer exists as an own path.