Roundhouse

Saylor Innovations On-Chain Data

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DataLiveeip155:8453Exactvia cdp
https://saylorinnovations.com/api/evm/base/balance/:address
EvmBaseBalanceOnchain
Calls · 30d
5→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$19.71
Verified settled volume
2,051 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.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-28 04:39Z
–
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa

The wallet the 402 directs payment to. Its full payment record 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.

Recent payments · which agents last used it

Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.

Payer PayeeChainAmountx402RouteAgeTxn hash
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xc44c8f…254652
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xc2afa5…33cdf4
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xc2b0ba…2d0f46
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x345867…ec0c85
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xb88e59…e57e7c
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xd1c2be…85ff94
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x824d84…5edba8
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x3f508f…93b0fb
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xb85987…be7811
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x5a9606…3afc27
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x31f95e…6819ae
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xc4b7c5…14b4c1
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x2249d5…9921fd
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x4518b4…f8a606
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x41bfc5…5ea3f5
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xc3a3af…5a58ed
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xecaa7c…65c8b1
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xeb0882…90272c
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x290bc5…766f9f
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xb5a518…fb3dfc
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xe2b724…a5570b
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x75720d…8e4683
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0xa219e5…ea848d
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x573d5b…dfa729
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI18d ago0x122b2e…87655f

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

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0xA2A8…fc8aa
Token contract
0x3c49…c3359
Payment window
2 minutes
10000units
on Arbitrum · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
0xA2A8…fc8aa
Token contract
0xaf88…e5831
Payment window
2 minutes
10000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
7LSjfr…Xacy7
Token contract
EPjFWd…TDt1v
Payment window
2 minutes
10000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
7LSjfr…Xacy7
Token contract
Es9vMF…nwNYB
Payment window
2 minutes
95125units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
7LSjfr…Xacy7
Token contract
So1111…11112
Payment window
2 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "memo": "saylor:evm:balance:base/balance/",
      "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:evm:balance:base/balance/",
      "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:evm:balance:base/balance/",
      "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:evm:balance:base/balance/",
      "session": "eyJhcnRpY2xlSWQiOiJldm06YmFsYW5jZTpiYXNlL2JhbGFuY2UvMHg0MjAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDA2IiwicmVmZXJlbmNlIjoiR0dLNnJKSmd5c3pDZEJQQU1CanM4cnFhZzhUN0dFOUo4ZlFpajFxUWR4S3kiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MzE2MjUxNTkzNH0.AGI1gT-mckt_-VbQLED0OX4Q-JNBbB9BHPQqZ2FctKc",
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
      "reference": "GGK6rJJgyszCdBPAMBjs8rqag8T7GE9J8fQij1qQdxKy"
    },
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
    "extra": {
      "memo": "saylor:evm:balance:base/balance/",
      "session": "eyJhcnRpY2xlSWQiOiJldm06YmFsYW5jZTpiYXNlL2JhbGFuY2UvMHg0MjAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDA2IiwicmVmZXJlbmNlIjoiMkJjTllKUDY3bUVVbTFMMWNmVjdqM3ZBRnBmSFhGSGdycmkxaWNvRkgyeGkiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MTAwMDAsImV4cCI6MTc5MzE2MjUxNTkzNX0.CQJ1i0wD_dNf6ARun-xS99Suq9mC5ZRYAQDFFIwqIxA",
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
      "reference": "2BcNYJP67mEUm1L1cfV7j3vAFpfHXFHgrri1icoFH2xi"
    },
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 120
  },
  {
    "asset": "So11111111111111111111111111111111111111112",
    "extra": {
      "memo": "saylor:evm:balance:base/balance/",
      "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": "eyJhcnRpY2xlSWQiOiJldm06YmFsYW5jZTpiYXNlL2JhbGFuY2UvMHg0MjAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDAwMDA2IiwicmVmZXJlbmNlIjoiM2lWdkprTTlwc1g1M2NFaTlGUms3ZWhnVEthc0taWktCQlJyckcxaGRHdkEiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6OTUxMjUsImV4cCI6MTc5MzE2MjUxNTkzNX0.Lwypx1YdRR6fSGKyeNFLB4BY1QbZlegZWjhIRjaQSyM",
      "reference": "3iVvJkM9psX53cEi9FRk7ehgTKasKZZKBBRrrG1hdGvA",
      "solUsdPrice": 101.97,
      "quotedLamports": "98068"
    },
    "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
    "amount": "95125",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "address": "EVM wallet address (0x-prefixed, 40 hex characters)"
        },
        "queryParams": {
          "tokens": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "block": 51738756,
          "chain": "base",
          "native": {
            "raw": "1234500000000000000",
            "symbol": "ETH",
            "balance": "1.2345"
          },
          "tokens": [
            {
              "raw": "250500000",
              "symbol": "USDC",
              "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "balance": "250.5",
              "decimals": 6
            }
          ],
          "wallet": "0x4200000000000000000000000000000000000006"
        }
      }
    },
    "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",
              "properties": {
                "tokens": {
                  "type": "string",
                  "description": "optional comma-separated ERC-20 addresses, up to 20"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "json"
            },
            "example": {
              "type": "object",
              "required": [
                "chain",
                "wallet",
                "native",
                "tokens"
              ],
              "properties": {
                "block": {
                  "type": [
                    "number",
                    "null"
                  ],
                  "description": "Block number the data was read at"
                },
                "chain": {
                  "type": "string",
                  "description": "Blockchain the data is for"
                },
                "native": {
                  "type": "object",
                  "description": "Native-token balance details"
                },
                "tokens": {
                  "type": "array",
                  "description": "Token balances or token records"
                },
                "wallet": {
                  "type": "string",
                  "description": "Wallet address queried"
                }
              }
            }
          }
        }
      }
    },
    "routeTemplate": "/api/evm/base/balance/:address"
  }
}

Provenance

Seen in the source catalog
2026-10-28 04:39Z
Last indexed by Roundhouse
2026-11-14 15:30Z
Last enriched (probe, favicon, geo)
2026-09-24 16:45Z
x402 version
2
Max timeout
120s
Liveness probe
HTTP 400
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent: it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Saylor Innovations On-Chain Data and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Saylor%20Innovations%20On-Chain%20Data'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://saylorinnovations.com/api/evm/base/balance/:address, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.