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Api Endpoint

EVM & Solana Utility Tools

Solidity ABI calldata encoder — encode canonical typed values for an EVM smart-contract function call, with an optional selector and exact 256-bit integers.

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Offering

Provider
chain-tools.use.x402atlas.com
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Blockchain And Crypto
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://chain-tools.use.x402atlas.com/evm/abi-encode
MIME type
Not provided
First seen
2026-10-16T01:50:10.647Z
Last seen
Tags
abi-encode, solidity-abi, EVM, blockchain-development, offline-computation

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.005 USDC
Atomic price: 5000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3
0.005 USDC
Atomic price: 5000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Payment option 4
0.005 USDC
Atomic price: 5000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "5000",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "5000",
    "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "5000",
    "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ"
  }
]

Observed health

Status
Reachable
Latest latency
11 ms
Average latency
17 ms
HTTP status
405
Last checked
Reachability
100% over 13 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "additionalProperties": false,
      "description": "One bounded standard Solidity ABI encoding request",
      "oneOf": [
        {
          "properties": {
            "include_selector": {
              "const": true
            }
          },
          "required": [
            "function"
          ]
        },
        {
          "not": {
            "required": [
              "function"
            ]
          },
          "properties": {
            "include_selector": {
              "const": false
            }
          }
        }
      ],
      "properties": {
        "function": {
          "description": "Function identifier required exactly when include_selector is true; never a full signature",
          "pattern": "^[A-Za-z_][A-Za-z0-9_]*$",
          "type": "string"
        },
        "include_selector": {
          "description": "Whether to prepend the four-byte selector for function and canonical types",
          "type": "boolean"
        },
        "types": {
          "description": "Supported canonical Solidity ABI types; uint/int aliases normalize to 256-bit forms",
          "items": {
            "description": "One closed-grammar ABI type with maximum nesting depth four",
            "type": "string"
          },
          "maxItems": 32,
          "minItems": 0,
          "type": "array"
        },
        "values": {
          "description": "Positional JSON values exactly matching types; integers are decimal strings",
          "items": {
            "description": "Boolean, string, byte/address/integer string, or positional tuple/array value as required by its type"
          },
          "maxItems": 32,
          "minItems": 0,
          "type": "array"
        }
      },
      "required": [
        "types",
        "values",
        "include_selector"
      ],
      "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 schema

{
  "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": "solidity-abi-v1",
          "description": "Pinned Solidity ABI grammar and byte contract",
          "type": "string"
        },
        "data": {
          "description": "Complete encoded bytes, including selector when requested",
          "pattern": "^0x(?:[0-9a-f]{2})*$",
          "type": "string"
        },
        "function_signature": {
          "description": "Canonical signature when selector included",
          "type": "string"
        },
        "include_selector": {
          "description": "Whether data begins with selector",
          "type": "boolean"
        },
        "operation": {
          "const": "abi-encode",
          "description": "Stable route operation",
          "type": "string"
        },
        "payload": {
          "description": "Selector-free canonical ABI payload",
          "pattern": "^0x(?:[0-9a-f]{2})*$",
          "type": "string"
        },
        "selector": {
          "description": "Four-byte selector when included",
          "pattern": "^0x(?:[0-9a-f]{2})*$",
          "type": "string"
        },
        "types": {
          "description": "Canonical ABI types",
          "items": {
            "description": "Canonical Solidity ABI type",
            "type": "string"
          },
          "type": "array"
        },
        "values": {
          "description": "Normalized values in exact type order",
          "items": {
            "description": "Normalized exact JSON representation"
          },
          "type": "array"
        },
        "warnings": {
          "description": "Always empty for deterministic offline computation",
          "items": {
            "description": "Warning",
            "type": "string"
          },
          "maxItems": 0,
          "type": "array"
        }
      },
      "required": [
        "operation",
        "algorithm_version",
        "types",
        "values",
        "include_selector",
        "payload",
        "data",
        "warnings"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}