Api Endpoint

Grade

Academic letter grade with red-pen marginalia for anything. $0.01 USDC.

Open interactive test console

Offering

Provider: api.anchor-x402.com
Method: POST
Offering type: Api Endpoint
Transport type: http
Category: Science And Education
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://api.anchor-x402.com/v1/grade
MIME type: Not provided
First seen: 2026-10-16T01:50:06.715Z
Last seen: 2026-11-01T14:59:17.120Z
Tags: grade, score, feedback, editor

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.01 USDC
Atomic price: 10000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2: 0.01 USDC
Atomic price: 10000 · Network: solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · Asset: USDC · Scheme: exact
Payment option 3: 10000 atomic units
Atomic price: 10000 · Network: eip155:5042 · Asset: 0x3600000000000000000000000000000000000000 · Scheme: exact
Payment option 4: 2000000000000000000 atomic units
Atomic price: 2000000000000000000 · Network: eip155:137 · Asset: 0x431D5dfF03120AFA4bDf332c61A6e1766eF37BDB · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "payTo": "0x127462e296fAc1A7F5cF33bA57bB2f0FFf5cD0B6"
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "payTo": "6apuZvJQ51Led9iEjnHw6f5jfnXL4qjt8S1h58PeXzuR"
  },
  {
    "scheme": "exact",
    "network": "eip155:5042",
    "asset": "0x3600000000000000000000000000000000000000",
    "amount": "10000",
    "payTo": "0x127462e296fAc1A7F5cF33bA57bB2f0FFf5cD0B6"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x431D5dfF03120AFA4bDf332c61A6e1766eF37BDB",
    "amount": "2000000000000000000",
    "payTo": "0x127462e296fAc1A7F5cF33bA57bB2f0FFf5cD0B6"
  }
]

Observed health

Status: Reachable
Latest latency: 30 ms
Average latency: 132 ms
HTTP status: 405
Last checked: 2026-11-02T10:24:18.104Z
Reachability: 100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "additionalProperties": false,
  "properties": {
    "body": {
      "properties": {
        "target": {
          "description": "Anything to grade.",
          "maxLength": 6000,
          "type": "string"
        }
      },
      "required": [
        "target"
      ]
    },
    "bodyType": {
      "enum": [
        "json",
        "form-data",
        "text"
      ],
      "type": "string"
    },
    "method": {
      "enum": [
        "POST",
        "PUT",
        "PATCH"
      ],
      "type": "string"
    },
    "type": {
      "const": "http",
      "type": "string"
    }
  },
  "required": [
    "type",
    "method",
    "bodyType",
    "body"
  ],
  "type": "object"
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "body": {
          "properties": {
            "target": {
              "description": "Anything to grade.",
              "maxLength": 6000,
              "type": "string"
            }
          },
          "required": [
            "target"
          ]
        },
        "bodyType": {
          "enum": [
            "json",
            "form-data",
            "text"
          ],
          "type": "string"
        },
        "method": {
          "enum": [
            "POST",
            "PUT",
            "PATCH"
          ],
          "type": "string"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method",
        "bodyType",
        "body"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "properties": {
            "letter_grade": {
              "enum": [
                "A+",
                "A",
                "A-",
                "B+",
                "B",
                "B-",
                "C+",
                "C",
                "C-",
                "D+",
                "D",
                "F"
              ],
              "type": "string"
            },
            "marginalia": {
              "items": {
                "type": "string"
              },
              "type": "array"
            },
            "summary": {
              "type": "string"
            }
          },
          "required": [
            "letter_grade",
            "marginalia",
            "summary"
          ],
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}