Keccak Merkle tree and proof builder — generate indexed sorted-pair inclusion proofs with
Keccak Merkle tree and proof builder — generate indexed sorted-pair inclusion proofs with domain separation and explicit odd-node promotion.
10000 (raw units)
price
2
calls / 30d
1
unique payers
2026-09-15
updated
Provider
chain-tools.use.x402atlas.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "10000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:137",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"amount": "10000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:42161",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"amount": "10000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"category": "utilities",
"info": {
"input": {
"body": {
"leaves": [
"0x616c706861",
"0x62657461",
"0x67616d6d61"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"algorithm_version": "keccak256-sorted-pairs-v1",
"leaf_count": 3,
"leaf_hashes": [
"0x180a512e153366b1510bf090b11069c19394ab868093ef5290ead07f1fbb3386",
"0x5b3931176fc5f22736bfc5393315c63244f57e672b5017c675220ec7de504ae6",
"0xe51a809d0bd7c39f11aa7f9ff0ba85099028c7d56f42313f3bb5495a7b967146"
],
"operation": "merkle-build",
"proofs": [
{
"index": 0,
"steps": [
{
"hash": "0x5b3931176fc5f22736bfc5393315c63244f57e672b5017c675220ec7de504ae6"
},
{
"hash": "0xe51a809d0bd7c39f11aa7f9ff0ba85099028c7d56f42313f3bb5495a7b967146"
}
]
},
{
"index": 1,
"steps": [
{
"hash": "0x180a512e153366b1510bf090b11069c19394ab868093ef5290ead07f1fbb3386"
},
{
"hash": "0xe51a809d0bd7c39f11aa7f9ff0ba85099028c7d56f42313f3bb5495a7b967146"
}
]
},
{
"index": 2,
"steps": [
{
"hash": "0xbfa0350c48ccd55fb3a8315a6d6bfc41877772eaebfcba73cb195984df5b3d32"
}
]
}
],
"root": "0x40a0fa2d0ce898ef138c3403645be77705df9d485ecc137b02b35eb9fdeaaf94",
"warnings": []
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"leaves": {
"description": "Raw leaves in stable caller order; duplicate values remain distinct by zero-based index",
"items": {
"description": "Zero to 4096 raw bytes as even-length 0x hexadecimal",
"maxLength": 8194,
"pattern": "^0x(?:[0-9a-fA-F]{2})*$",
"type": "string"
},
"maxItems": 1024,
"minItems": 1,
"type": "array"
}
},
"required": [
"leaves"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"_atlas": {
"additionalProperties": false,
"description": "Atlas documentation and related-route metadata added after deployment",
"properties": {
"docs": {
"description": "Documentation URL for this bridge",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"related": {
"description": "Bounded related Atlas routes",
"items": {
"additionalProperties": false,
"description": "One related Atlas route",
"properties": {
"bridge": {
"description": "Related bridge name",
"maxLength": 64,
"type": "string"
},
"docs": {
"description": "Related bridge documentation URL",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"summary": {
"description": "Short capability summary",
"maxLength": 256,
"type": "string"
},
"url": {
"description": "Related route URL",
"format": "uri",
"maxLength": 512,
"type": "string"
}
},
"required": [
"bridge",
"url",
"docs",
"summary"
],
"type": "object"
},
"maxItems": 3,
"type": "array"
}
},
"required": [
"docs"
],
"type": "object"
},
"algorithm_version": {
"const": "keccak256-sorted-pairs-v1",
"description": "Atlas domain-separated sorted-pair profile",
"type": "string"
},
"leaf_count": {
"description": "Number of original leaves",
"maximum": 1024,
"minimum": 1,
"type": "integer"
},
"leaf_hashes": {
"description": "Domain-separated leaf hashes in original order",
"items": {
"description": "Leaf hash",
"pattern": "^0x[0-9a-f]{64}$",
"type": "string"
},
"maxItems": 1024,
"minItems": 1,
"type": "array"
},
"operation": {
"const": "merkle-build",
"description": "Stable route operation",
"type": "string"
},
"proofs": {
"description": "Exactly one proof for every original index",
"items": {
"additionalProperties": false,
"properties": {
"index": {
"description": "Zero-based original leaf index",
"maximum": 1023,
"minimum": 0,
"type": "integer"
},
"steps": {
"description": "Sibling hashes in leaf-to-root order; odd promotions add no step",
"items": {
"additionalProperties": false,
"properties": {
"hash": {
"description": "Sibling node hash; direction is unnecessary because pairs sort by hash",
"pattern": "^0x[0-9a-f]{64}$",
"type": "string"
}
},
"required": [
"hash"
],
"type": "object"
},
"maxItems": 10,
"type": "array"
}
},
"required": [
"index",
"steps"
],
"type": "object"
},
"maxItems": 1024,
"minItems": 1,
"type": "array"
},
"root": {
"description": "Tree root",
"pattern": "^0x[0-9a-f]{64}$",
"type": "string"
},
"warnings": {
"description": "Always empty",
"items": {
"description": "Warning",
"type": "string"
},
"maxItems": 0,
"type": "array"
}
},
"required": [
"operation",
"algorithm_version",
"leaf_count",
"root",
"leaf_hashes",
"proofs",
"warnings"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
},
"tags": [
"merkle-proof",
"merkle-tree",
"keccak256",
"proof-generation",
"blockchain-development"
]
}
}Use it
curl
curl "https://chain-tools.use.x402atlas.com/merkle/build" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://chain-tools.use.x402atlas.com/merkle/build");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://chain-tools.use.x402atlas.com/merkle/build")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/3457.json, and this resource appears in /discovery/resources and /discovery/search.