Call when an agent needs native ETH plus up to 20 ERC-20 balances for one Base a
Call when an agent needs native ETH plus up to 20 ERC-20 balances for one Base address. Send address and an optional tokens list; omit tokens for Circle USDC. Multicall3 batches the reads. Read-only. No spend. Send JSON {"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","tokens":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"]}. Exact $0.005 USDC on Base. Try unpaid POST /v1/sandbox/base-portfolio first.
Not tested: has real-world effectsour last check, 2026-10-18
0 of 0checks answered this week
n/amedian answer time
$0.005listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://agentshelf.syntexa.ch/v1/base-portfolio
| Category | Code and developer |
|---|---|
| Provider host | agentshelf.syntexa.ch |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"tokens": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"examples": [
{
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"tokens": [
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
]
}
],
"properties": {
"address": {
"description": "Holder on Base mainnet. Example: 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045. Returns native ETH plus ERC-20 balances. EIP-55 or all one case.",
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"tokens": {
"description": "Up to 20 ERC-20 addresses. Example: [\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"]. Omit the field for Circle USDC. An empty list is rejected.",
"examples": [
[
"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
]
],
"items": {
"description": "ERC-20 contract. Example: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913. At most 20. Omit the list to use Circle USDC.",
"type": "string"
},
"maxItems": 20,
"type": "array"
}
},
"required": [
"address"
],
"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": [
{
"address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
"billed": true,
"eth_balance": "1",
"eth_balance_wei": "1000000000000000000",
"network": "eip155:8453",
"ok": true,
"receipt_id": "rcpt_01EXAMPLE000000000000000",
"tokens": [
{
"balance": "2.5",
"balance_raw": "2500000",
"decimals": 6,
"ok": true,
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
],
"used_default_tokens": false,
"warnings": []
}
],
"properties": {
"address": {
"examples": [
"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
],
"type": "string"
},
"billed": {
"examples": [
true
],
"type": "boolean"
},
"eth_balance": {
"examples": [
"1"
],
"type": "string"
},
"eth_balance_wei": {
"examples": [
"1000000000000000000"
],
"type": "string"
},
"network": {
"const": "eip155:8453",
"examples": [
"eip155:8453"
],
"type": "string"
},
"ok": {
"const": true,
"examples": [
true
],
"type": "boolean"
},
"receipt_id": {
"examples": [
"rcpt_01EXAMPLE000000000000000"
],
"type": "string"
},
"tokens": {
"examples": [
[
{
"balance": "2.5",
"balance_raw": "2500000",
"decimals": 6,
"ok": true,
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
}
]
],
"items": {
"additionalProperties": false,
"properties": {
"balance": {
"type": [
"string",
"null"
]
},
"balance_raw": {
"type": [
"string",
"null"
]
},
"decimals": {
"anyOf": [
{
"minimum": 0,
"type": "integer"
},
{
"type": "null"
}
]
},
"ok": {
"type": "boolean"
},
"token": {
"type": "string"
}
},
"required": [
"token",
"decimals",
"balance_raw",
"balance",
"ok"
],
"type": "object"
},
"maxItems": 20,
"type": "array"
},
"used_default_tokens": {
"examples": [
false
],
"type": "boolean"
},
"warnings": {
"default": [],
"examples": [
[]
],
"item