Call when an agent needs a read-only Base eth_call
Call when an agent needs a read-only Base eth_call. Send to and data (hex) or a function signature plus args. Optional from and block. Reverts return a decoded reason. No state change and no spend. Send JSON {"to":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","data":"0x18160ddd"}. Exact $0.004 USDC on Base. Try unpaid POST /v1/sandbox/base-eth-call first.
Not tested: has real-world effectsour last check, 2026-10-18
0 of 0checks answered this week
n/amedian answer time
$0.004listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://agentshelf.syntexa.ch/v1/base-eth-call
| Category | Code and developer |
|---|---|
| Provider host | agentshelf.syntexa.ch |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"data": "0x18160ddd",
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"data": "0x18160ddd",
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
],
"properties": {
"args": {
"description": "JSON array of arguments. Example: [\"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045\"]. A POST array is accepted. Requires signature.",
"maxLength": 2048,
"minLength": 2,
"type": "string"
},
"block": {
"description": "Block tag or number for eth_call. latest, finalized, safe, or a non-negative integer. Omit it for latest. The call is read-only.",
"type": "string"
},
"data": {
"description": "Calldata, 0x hex, at most 2048 characters. Example: 0x18160ddd (totalSupply()). Send data or signature, not both. eth_call cannot change state.",
"examples": [
"0x18160ddd"
],
"pattern": "^0x[0-9a-fA-F]*$",
"type": "string"
},
"from": {
"description": "Optional eth_call from address. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. It is not a transaction sender and nothing is spent.",
"type": "string"
},
"signature": {
"description": "Function signature. Example: decimals() or balanceOf(address)(uint256). args is a JSON array when the function has parameters. Send signature or data, not both.",
"maxLength": 180,
"minLength": 3,
"type": "string"
},
"to": {
"description": "Contract to call on Base. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. The call is eth_call with no value, so it cannot change state.",
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
}
},
"required": [
"to"
],
"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,
"examples": [
{
"billed": true,
"block": "latest",
"data": "0x18160ddd",
"decoded": null,
"from": null,
"network": "eip155:8453",
"ok": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"result": "0x00000000000000000000000000000000000000000000000000000000000f4240",
"revert_data": null,
"revert_reason": null,
"success": true,
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"warnings": []
}
],
"properties": {
"billed": {
"examples": [
true
],
"type": "boolean"
},
"block": {
"examples": [
"latest"
],
"type": "string"
},
"data": {
"examples": [
"0x18160ddd"
],
"type": "string"
},
"decoded": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"from": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"result": {
"examples": [
"0x00000000000000000000000000000000000000000000000000000000000f4240"
],
"type": "string"
},
"revert_data": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"revert_reason": {
"examples": [
null
],
"type": [
"string",
"null"
]
},
"success": {
"examples": [
true
],
"type": "boolean"
},
"to": {
"examples": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
],
"type": "string"
},
"warnings": {
"default": [],
"examples": [
[]
],
"items": {
"type": "string"
},
"t