Saylor Innovations Data Desk

Name: Saylor Innovations Data Desk
Price: 0.01 USDC
Availability: InStock

USDC, USDT and DAI balances for a wallet across every supported EVM chain in one call, totalled at face value and split by symbol and chain.

DataLiveeip155:8453Exactvia cdp

https://saylorinnovations.com/api/chain/stablecoin-balances

Usdc balance all chainsStablecoin holdings multichainWallet usdc usdt daiCross chain stablecoin totalAgent treasury balance

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 6 snapshots so far.

$15.76

Verified settled volume

1,657 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-10-23 01:17Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required to access this resource.",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "memo": "saylor:datadesk:chain-stablecoin",
        "name": "USD Coin",
        "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
        "version": "2",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "memo": "saylor:datadesk:chain-stablecoin",
        "name": "USD Coin",
        "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
        "version": "2",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:137",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "memo": "saylor:datadesk:chain-stablecoin",
        "name": "USD Coin",
        "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
        "version": "2",
        "facilitatorOnly": true,
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
      "amount": "10000",
      "scheme": "exact",
      "network": "eip155:42161",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "memo": "saylor:datadesk:chain-stablecoin",
        "session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1zdGFibGVjb2luLWJhbGFuY2VzIiwicmVmZXJlbmNlIjoiQk1lTW1RWng2cHJzcmNEcks2aGRxVE1UTVBzdXJhS2V5WHdQS3NrNjFXUSIsInJlY2lwaWVudCI6IjdMU2pmckpmOGZOc0I4VkE5dTdOM1dFbjI1c21RTHBvYjNTdnlVdlhhY3k3IiwibWludCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwibWluQW1vdW50IjoxMDAwMCwiZXhwIjoxNzkyNTU4MDYwMzYzfQ.VpiXkK7yt6mhPDpJZLJY4Veyfo5SjTf5Wu9ZJld6MXo",
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
        "reference": "BMeMmQZx6prsrcDrK6hdqTMTMPsuraKeyXwPKsk61WQ"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
      "extra": {
        "memo": "saylor:datadesk:chain-stablecoin",
        "session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1zdGFibGVjb2luLWJhbGFuY2VzIiwicmVmZXJlbmNlIjoiMTJWZ1pOcWlOUFNFeXJMcEw4UnQ3dHpyMlY0Z0tEYTR5ZFdZVXJEaWh2aFUiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MjU1ODA2MDM2M30.wwb3fP1bBtIIKjsHzLNdR2S_j4Jpvh5o4FTxdwcep3o",
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
        "reference": "12VgZNqiNPSEyrLpL8Rt7tzr2V4gKDa4ydWYUrDihvhU"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "10000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "So11111111111111111111111111111111111111112",
      "extra": {
        "memo": "saylor:datadesk:chain-stablecoin",
        "note": "Native SOL: send lamports with a system transfer, not an SPL transfer. Price is quoted live and this quote expires in 120s.",
        "native": true,
        "session": "eyJhcnRpY2xlSWQiOiJkYXRhZGVzazpjaGFpbi1zdGFibGVjb2luLWJhbGFuY2VzIiwicmVmZXJlbmNlIjoiRjhQYXFtR2o3MmNTUW45bXVCdDZlQkRRNlQ2eXFiVFdGaDhjQmZocXdDVGkiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTE4MTIsImV4cCI6MTc5MjU1ODA2MDM2M30.ejPFdpROIftxxnlzKF_KhEDQB2RvahhGiutSql2YsX8",
        "reference": "F8PaqmGj72cSQn9muBt6eBDQ6T6yqbTWFh8cBfhqwCTi",
        "solUsdPrice": 105.65,
        "quotedLamports": "94652"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "91812",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://saylorinnovations.com/api/chain/stablecoin-balances?address=0x28C6c06298d514Db089934071355E5743bf21d60",
    "tags": [
      "usdc balance all chains",
      "stablecoin holdings multichain",
      "wallet usdc usdt dai",
      "cross chain stablecoin total",
      "agent treasury balance"
    ],
    "iconUrl": "https://saylorinnovations.com/og-image.jpg",
    "mimeType": "application/json",
    "description": "USDC, USDT and DAI balances for a wallet across every supported EVM chain in one call, totalled at face value and split by symbol and chain.",
    "serviceName": "Saylor Innovations Data Desk"
  },
  "extensions": {
    "tags": [
      "usdc balance all chains",
      "stablecoin holdings multichain",
      "wallet usdc usdt dai",
      "cross chain stablecoin total",
      "agent treasury balance"
    ],
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "address": "0x28C6c06298d514Db089934071355E5743bf21d60"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "note": "USDC, USDT and DAI balances where the token is on the chain's built-in list, summed at face value of 1 dollar per token. That ignores any depeg, and other stablecoins are not included.",
            "source": "Chain JSON-RPC (EVM chains with a stablecoin list)",
            "address": "0x28C6c06298d514Db089934071355E5743bf21d60",
            "results": [
              {
                "chain": "ethereum",
                "tokens": [
                  {
                    "symbol": "USDC",
                    "balance": "52017.30822"
                  },
                  {
                    "symbol": "USDT",
                    "balance": "951455829.094092"
                  },
                  {
                    "symbol": "DAI",
                    "balance": "38665.901889880916441732"
                  }
                ],
                "chain_id": 1,
                "total_face_value": 951546512.304202
              },
              {
                "chain": "base",
                "tokens": [
                  {
                    "symbol": "USDC",
                    "balance": "604.382274"
                  }
                ],
                "chain_id": 8453,
                "total_face_value": 604.382274
              },
              {
                "chain": "arbitrum",
                "tokens": [
                  {
                    "symbol": "USDC",
                    "balance": "37.013599"
                  },
                  {
                    "symbol": "USDT",
                    "balance": "20.640044"
                  }
                ],
                "chain_id": 42161,
                "total_face_value": 57.653643
              }
            ],
            "by_symbol": {
              "DAI": 38665.90189,
              "USDC": 52738.60886,
              "USDT": 951460140.401409
            },
            "elapsed_ms": 96,
            "chains_holding": [
              "ethereum",
              "base",
              "arbitrum"
            ],
            "chains_answered": 7,
            "total_stablecoins_face_value": 951551544.912159,
            "chains_with_stablecoin_support": 7
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "required": [
                  "address"
                ],
                "properties": {
                  "address": {
                    "type": "string",
                    "description": "the wallet to check on every chain"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "json"
              },
              "example": {
                "type": "object",
                "required": [
                  "address",
                  "chains_answered",
                  "total_stablecoins_face_value",
                  "by_symbol",
                  "results",
                  "note",
                  "source"
                ],
                "properties": {
                  "note": {
                    "type": "string",
                    "description": "plain-language reading of the result"
                  },
                  "source": {
                    "type": "string",
                    "description": "where the data was read from or how it was computed"
                  },
                  "address": {
                    "type": "string",
                    "description": "the wallet queried"
                  },
                  "results": {
                    "type": [
                      "array",
                      "null"
                    ],
                    "items": {
                      "type": "object",
                      "properties": {
                        "chain": {
                          "type": [
                            "string",
                            "null"
                          ],
                          "description": "chain name"
                        },
                        "tokens": {
                          "type": [
                            "array",
                            "null"
                          ],
                          "description": "balances per token"
                        },
                        "total_face_value": {
                          "type": [
                            "number",
                            "null"
                          ],
                          "description": "stablecoins on that chain at face value"
                        }
                      }
                    },
                    "description": "one entry per chain"
                  },
                  "by_symbol": {
                    "type": [
                      "object",
                      "null"
                    ],
                    "description": "totals per stablecoin symbol"
                  },
                  "elapsed_ms": {
                    "type": "number",
                    "description": "total time for all chains"
                  },
                  "chains_holding": {
                    "type": [
                      "array",
                      "null"
                    ],
                    "description": "chains where the wallet holds any"
                  },
                  "chains_answered": {
                    "type": "number",
                    "description": "of those, chains that answered"
                  },
                  "total_stablecoins_face_value": {
                    "type": "number",
                    "description": "sum at one dollar per token"
                  },
                  "chains_with_stablecoin_support": {
                    "type": "number",
                    "description": "chains with a built-in stablecoin list"
                  }
                }
              }
            }
          }
        }
      }
    },
    "method": "GET",
    "example": {
      "note": "USDC, USDT and DAI balances where the token is on the chain's built-in list, summed at face value of 1 dollar per token. That ignores any depeg, and other stablecoins are not included.",
      "source": "Chain JSON-RPC (EVM chains with a stablecoin list)",
      "address": "0x28C6c06298d514Db089934071355E5743bf21d60",
      "results": [
        {
          "chain": "ethereum",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "52017.30822"
            },
            {
              "symbol": "USDT",
              "balance": "951455829.094092"
            },
            {
              "symbol": "DAI",
              "balance": "38665.901889880916441732"
            }
          ],
          "chain_id": 1,
          "total_face_value": 951546512.304202
        },
        {
          "chain": "base",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "604.382274"
            }
          ],
          "chain_id": 8453,
          "total_face_value": 604.382274
        },
        {
          "chain": "arbitrum",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "37.013599"
            },
            {
              "symbol": "USDT",
              "balance": "20.640044"
            }
          ],
          "chain_id": 42161,
          "total_face_value": 57.653643
        },
        {
          "chain": "optimism",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "0.0"
            },
            {
              "symbol": "USDT",
              "balance": "0.15"
            }
          ],
          "chain_id": 10,
          "total_face_value": 0.15
        },
        {
          "chain": "polygon",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "50.074767"
            },
            {
              "symbol": "USDT",
              "balance": "15.783831"
            }
          ],
          "chain_id": 137,
          "total_face_value": 65.858598
        },
        {
          "chain": "bsc",
          "tokens": [
            {
              "symbol": "USDT",
              "balance": "4274.733442422520473442"
            },
            {
              "symbol": "USDC",
              "balance": "29.83"
            }
          ],
          "chain_id": 56,
          "total_face_value": 4304.563442
        },
        {
          "chain": "avalanche",
          "tokens": [
            {
              "symbol": "USDC",
              "balance": "0.0"
            },
            {
              "symbol": "USDT",
              "balance": "0.0"
            }
          ],
          "chain_id": 43114,
          "total_face_value": 0
        },
        {
          "ok": true,
          "chain": "gnosis",
          "error": null,
          "chain_id": 100,
          "supported": false
        },
        {
          "ok": true,
          "chain": "linea",
          "error": null,
          "chain_id": 59144,
          "supported": false
        },
        {
          "ok": true,
          "chain": "scroll",
          "error": null,
          "chain_id": 534352,
          "supported": false
        },
        {
          "ok": true,
          "chain": "mantle",
          "error": null,
          "chain_id": 5000,
          "supported": false
        },
        {
          "ok": true,
          "chain": "blast",
          "error": null,
          "chain_id": 81457,
          "supported": false
        },
        {
          "ok": true,
          "chain": "sonic",
          "error": null,
          "chain_id": 146,
          "supported": false
        },
        {
          "ok": true,
          "chain": "celo",
          "error": null,
          "chain_id": 42220,
          "supported": false
        },
        {
          "ok": true,
          "chain": "berachain",
          "error": null,
          "chain_id": 80094,
          "supported": false
        },
        {
          "ok": true,
          "chain": "unichain",
          "error": null,
          "chain_id": 130,
          "supported": false
        }
      ],
      "by_symbol": {
        "DAI": 38665.90189,
        "USDC": 52738.60886,
        "USDT": 951460140.401409
      },
      "elapsed_ms": 96,
      "chains_holding": [
        "ethereum",
        "base",
        "arbitrum",
        "optimism",
        "polygon",
        "bsc"
      ],
      "chains_answered": 7,
      "total_stablecoins_face_value": 951551544.912159,
      "chains_with_stablecoin_support": 7
    },
    "license": "LicenseRef-Saylor-Agent-Use-1.0",
    "mimeType": "application/json",
    "freshness": "fetched live (cached up to 1 hour for large reference files)",
    "tokenCount": null,
    "inputSchema": {
      "address": "the wallet to check on every chain"
    },
    "serviceName": "Saylor Innovations Data Desk",
    "instructions": "STANDARD PATH (works with stock x402 clients): send payload.transaction — a base64 partially-signed Solana transaction — and we route verify/settle through an x402 facilitator that sponsors the fee and submits it. Include the chosen accepts entry as \"accepted\" so we can match terms. ALTERNATIVE PATH (no facilitator): Pick ONE entry from accepts and use the reference and session from THAT entry — each asset has its own. USDC or USDT: send an SPL transfer of the exact amount. Native SOL (asset=So11111111111111111111111111111111111111112, extra.native=true): send that many lamports with a system transfer. Either way include extra.reference as a read-only account (Solana Pay style), then retry with PAYMENT-SIGNATURE: base64({x402Version:2, payload:{session, reference}}). If your client cannot attach a reference, send payload.signature instead (USDC only). SOL amounts are quoted live and expire in 120s; stablecoins do not move. The facilitator path verifies and settles in this request. Only the alternative self-submitted Solana path needs retries while the transfer is indexed (typically 3-4 attempts over 10-20s). On that path, a 402 saying \"payment not found on-chain yet\" means keep retrying.",
    "outputSchema": {
      "type": "object",
      "required": [
        "address",
        "chains_answered",
        "total_stablecoins_face_value",
        "by_symbol",
        "results",
        "note",
        "source"
      ],
      "properties": {
        "note": {
          "type": "string",
          "description": "plain-language reading of the result"
        },
        "source": {
          "type": "string",
          "description": "where the data was read from or how it was computed"
        },
        "address": {
          "type": "string",
          "description": "the wallet queried"
        },
        "results": {
          "type": [
            "array",
            "null"
          ],
          "items": {
            "type": "object",
            "properties": {
              "chain": {
                "type": [
                  "string",
                  "null"
                ],
                "description": "chain name"
              },
              "tokens": {
                "type": [
                  "array",
                  "null"
                ],
                "description": "balances per token"
              },
              "total_face_value": {
                "type": [
                  "number",
                  "null"
                ],
                "description": "stablecoins on that chain at face value"
              }
            }
          },
          "description": "one entry per chain"
        },
        "by_symbol": {
          "type": [
            "object",
            "null"
          ],
          "description": "totals per stablecoin symbol"
        },
        "elapsed_ms": {
          "type": "number",
          "description": "total time for all chains"
        },
        "chains_holding": {
          "type": [
            "array",
            "null"
          ],
          "description": "chains where the wallet holds any"
        },
        "chains_answered": {
          "type": "number",
          "description": "of those, chains that answered"
        },
        "total_stablecoins_face_value": {
          "type": "number",
          "description": "sum at one dollar per token"
        },
        "chains_with_stablecoin_support": {
          "type": "number",
          "description": "chains with a built-in stablecoin list"
        }
      }
    },
    "noPathTemplate": true,
    "settlementModes": [
      "facilitator-transaction",
      "self-submitted-reference"
    ],
    "typicalLatencyMs": 700
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0xA2A8…fc8aa. The signed payment is good for 2 minutes.

Paid to: 0xA2A8…fc8aa
USD Coin contract: 0x8335…02913
Payment window: 2 minutes
As published: 10000 smallest units

10000units

on Polygon · exact scheme