NFT holdings check on 16 EVM chains
NFT holdings check on 16 EVM chains: how many tokens a wallet holds in each of up to 10 ERC-721 collections, with collection names and symbols.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
291 msmedian answer time
$0.01listed price per call
$0.01price 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
GET https://saylorinnovations.com/api/chain/nft-holdings
| Category | Market data |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 291 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"collections": "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D,0x60E4d786628Fea6478F785A6d7e704777c86a7c6",
"owner": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"chain": {
"description": "chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id",
"type": "string"
},
"collections": {
"description": "comma-separated ERC-721 collection contracts, 1 to 10",
"type": "string"
},
"owner": {
"description": "the wallet to check",
"type": "string"
}
},
"required": [
"chain",
"owner",
"collections"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"chain": {
"description": "the chain name that was queried",
"type": "string"
},
"chain_id": {
"description": "EIP-155 chain id of that network",
"type": "number"
},
"collections_checked": {
"description": "collections read",
"type": "number"
},
"collections_held": {
"description": "collections the wallet holds at least one token in",
"type": "number"
},
"holdings": {
"description": "one entry per collection",
"items": {
"properties": {
"balance": {
"description": "tokens held",
"type": [
"string",
"null"
]
},
"collection": {
"description": "collection contract",
"type": [
"string",
"null"
]
},
"erc721_confirmed": {
"description": "true when the contract confirms ERC-721 via ERC-165",
"type": [
"boolean",
"null"
]
},
"holds": {
"description": "true when balance is above zero",
"type": [
"boolean",
"null"
]
},
"name": {
"description": "collection name",
"type": [
"string",
"null"
]
},
"status": {
"description": "holds, none or not_an_erc721_collection_here",
"type": [
"string",
"null"
]
},
"symbol": {
"description": "collection symbol",
"type": [
"string",
"null"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"note": {
"description": "plain-language reading of the result",
"type": "string"
},
"owner": {
"description": "wallet checked",
"type": "string"
},
"source": {
"description": "where the data was read from or how it was computed",
"type": "string"
},
"total_tokens": {
"description": "tokens held across the collections",
"type": "number"
}
},
"required": [
"chain",
"chain_id",
"owner",
"collections_checked",
"collections_held",
"holdings",
"note",
"source"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}