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

Response:

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

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

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

HTTP (no key)

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.

CLI

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

Get the client at /clients/cli/.

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