Saylor Innovations Grammar Check

Name: Saylor Innovations Grammar Check
Price: 0.01 USDC
Availability: InStock

Grammar, spelling and style check in 30+ languages - issues with positions, suggestions and corrected text

OtherLiveeip155:8453Exactvia cdp

https://saylorinnovations.com/api/grammar/check

GrammarCheckSpellingProofreading

Calls · 30d

3↑ 14%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 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 2026-10-20 06:41Z

—

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": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "memo": "saylor:grammar:check",
        "session": "eyJhcnRpY2xlSWQiOiJncmFtbWFyOmNoZWNrIiwicmVmZXJlbmNlIjoiODRQc2U1ZmVzdktNblpUVmtKd1J4dzlkaThadDVvZmpQYVBFV1hMS3ZRTm0iLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFUGpGV2RkNUF1ZnFTU3FlTTJxTjF4enliYXBDOEc0d0VHR2tad3lURHQxdiIsIm1pbkFtb3VudCI6MjAwMCwiZXhwIjoxNzkwMzA4MDMyNTM3fQ.ngomnlu-KVF_rhci42ZSiCyQPyXkDzNzdqCmTMfIdmQ",
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
        "reference": "84Pse5fesvKMnZTVkJwRxw9di8Zt5ofjPaPEWXLKvQNm"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "2000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
      "extra": {
        "memo": "saylor:grammar:check",
        "session": "eyJhcnRpY2xlSWQiOiJncmFtbWFyOmNoZWNrIiwicmVmZXJlbmNlIjoiRmViZERLYXVaSDdjQjRDeGtkN3o1YXNFclNyam1xU3hrM3VkVmdZRmNqNDYiLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOiJFczl2TUZyemFDRVJtSmZyRjRIMkZZRDRLQ29Oa1kxMU1jQ2U4QmVud05ZQiIsIm1pbkFtb3VudCI6MjAwMCwiZXhwIjoxNzkwMzA4MDMyNTM3fQ.GZZDtrYHUb87euUP4LThWDiakR4Q8OfNWoUNC9N5bFQ",
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
        "reference": "FebdDKauZH7cB4Cxkd7z5asErSrjmqSxk3udVgYFcj46"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "2000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "memo": "saylor:grammar:check",
        "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": "0xf8A376eBF123D7252cd7b66bcD77A727a4def22f",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "extra": {
        "memo": "saylor:grammar:check",
        "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": "0xf8A376eBF123D7252cd7b66bcD77A727a4def22f",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:137",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "extra": {
        "memo": "saylor:grammar:check",
        "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": "0xf8A376eBF123D7252cd7b66bcD77A727a4def22f",
      "amount": "2000",
      "scheme": "exact",
      "network": "eip155:42161",
      "maxTimeoutSeconds": 120
    },
    {
      "asset": "So11111111111111111111111111111111111111112",
      "extra": {
        "memo": "saylor:grammar:check",
        "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": "eyJhcnRpY2xlSWQiOiJncmFtbWFyOmNoZWNrIiwicmVmZXJlbmNlIjoiRFFvVUpYM1JVdFU0WFlmVkpHeDdXVGUxbXpqUWNjZllDanE4ZnZ2cGVUb28iLCJyZWNpcGllbnQiOiI3TFNqZnJKZjhmTnNCOFZBOXU3TjNXRW4yNXNtUUxwb2IzU3Z5VXZYYWN5NyIsIm1pbnQiOm51bGwsIm1pbkFtb3VudCI6MTY1ODgsImV4cCI6MTc5MDMwODAzMjUzN30.ba4f0g_wJe-3Mr1viQJmzIbdXfJeH65Jc044i9n0hMc",
        "reference": "DQoUJX3RUtU4XYfVJGx7WTe1mzjQccfYCjq8fvvpeToo",
        "solUsdPrice": 116.94,
        "quotedLamports": "17102"
      },
      "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
      "amount": "16588",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "maxTimeoutSeconds": 120
    }
  ],
  "resource": {
    "url": "https://saylorinnovations.com/api/grammar/check?text=Their%20is%20a%20eror%20in%20this%20sentense.",
    "tags": [
      "grammar",
      "check",
      "spelling",
      "proofreading"
    ],
    "iconUrl": "https://saylorinnovations.com/og-image.jpg",
    "mimeType": "application/json",
    "description": "Grammar & Spelling Check (30+ languages) — Language",
    "serviceName": "Saylor Innovations Grammar Check"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "text": "Their is a eror in this sentense."
          }
        },
        "output": {
          "type": "json",
          "example": {
            "issues": 3,
            "matches": [
              {
                "text": "eror",
                "message": "Possible spelling mistake found.",
                "replacements": [
                  "error"
                ]
              }
            ],
            "language": {
              "used": "English (US)",
              "detected": "English (US)"
            },
            "corrected_text": "There is an error in this sentence."
          }
        }
      },
      "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",
                  "POST",
                  "PUT",
                  "PATCH",
                  "DELETE",
                  "HEAD"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "text": {
                    "type": "string",
                    "description": "text to check, up to 3000 characters (query)"
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "json"
              },
              "example": {
                "type": "object",
                "required": [
                  "issues",
                  "matches"
                ],
                "properties": {
                  "issues": {
                    "type": "number"
                  },
                  "matches": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    }
                  },
                  "corrected_text": {
                    "type": "string"
                  }
                }
              }
            }
          }
        }
      }
    },
    "method": "GET",
    "example": {
      "issues": 3,
      "matches": [
        {
          "text": "eror",
          "message": "Possible spelling mistake found.",
          "replacements": [
            "error"
          ]
        }
      ],
      "language": {
        "used": "English (US)",
        "detected": "English (US)"
      },
      "corrected_text": "There is an error in this sentence."
    },
    "license": "Source terms apply (see response)",
    "mimeType": "application/json",
    "freshness": "live",
    "tokenCount": null,
    "inputSchema": {
      "text": "text to check, up to 3000 characters (query)",
      "language": "optional language code, e.g. en-US, de-DE, fr; default auto-detect (query)"
    },
    "serviceName": "Saylor Innovations Grammar Check",
    "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": [
        "issues",
        "matches"
      ],
      "properties": {
        "issues": {
          "type": "number"
        },
        "matches": {
          "type": "array",
          "items": {
            "type": "object"
          }
        },
        "corrected_text": {
          "type": "string"
        }
      }
    },
    "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