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
0x61d6…c9f30xa2a8…c8aaBaseBase$0.01100%coinbase14d ago0x2fcba7…fa14a1
0x61d6…c9f30xa2a8…c8aaBaseBase$0.01100%coinbase14d ago0x4e3a03…518c20
0x6031…c2d10xa2a8…c8aaBaseBase$0.01100%coinbase17d ago0x03a981…4a7c35
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x18211d…4e9f20
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x20d3d3…92d6ed
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xefa385…c524b6
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x073c43…44a6b5
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x5a6a88…714318
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xc6d593…e35097
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x147149…8feac6
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x85dd01…a9626d
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xb1bddf…dfe19e
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x912ce4…842ca2
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x06d32f…ecb25a
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x800687…eb3f68
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x15906a…2243e6
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x666a7d…5fe28a
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x764744…8faea4
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x48c72c…3372a6
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x76a258…8d845b
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0xefd61a…ed88e5
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x3b82dc…98e24b
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x5a28a9…b5d0f0
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x7954e5…f61887
0xc74c…06270xa2a8…c8aaBaseBase$0.01100%payAI17d ago0x499e7d…e4605d

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 09:50Z
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.