Api Endpoint

api.agentstools.dev

US capital gains tax estimate: long-term 0/15/20 percent rates or short-term ordinary rates, plus the net investment income tax. Pure computation over your inputs, not tax advice.

Open interactive test console

Offering

Provider: api.agentstools.dev
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Financial Analysis
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://api.agentstools.dev/tax/capgains
MIME type: application/json
First seen: 2026-10-16T02:11:22.308Z
Last seen: 2026-11-04T10:17:19.073Z
Tags: tax, capital-gains, niit, investments, long-term, short-term

Website

Payment pricing

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

Payment option 1: 0.003 USDC
Atomic price: 3000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "3000",
    "payTo": "0xF22e558a00D91Ee12A1F50C52186FecB8dDFf493"
  }
]

Observed health

Status: Healthy
Latest latency: 365 ms
Average latency: 811 ms
HTTP status: 402
Last checked: 2026-11-04T10:17:19.068Z
Reachability: 100% over 13 checks

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

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "gain": {
          "type": "number",
          "description": "Capital gain amount (>= 0)"
        },
        "holding_period": {
          "type": "string",
          "enum": [
            "long",
            "short"
          ],
          "description": "long uses 0/15/20 rates; short uses ordinary rates"
        },
        "ordinary_income": {
          "type": "number",
          "description": "Other taxable income, used to stack the gain into brackets"
        },
        "filing_status": {
          "type": "string",
          "enum": [
            "single",
            "married_jointly",
            "married_separately",
            "head_of_household"
          ],
          "description": "Filing status, default single"
        },
        "tax_year": {
          "type": "integer",
          "description": "Tax year, default 2026"
        }
      },
      "required": [
        "gain"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "additionalProperties": false,
      "properties": {
        "method": {
          "enum": [
            "GET",
            "HEAD",
            "DELETE"
          ],
          "type": "string"
        },
        "queryParams": {
          "properties": {
            "filing_status": {
              "description": "Filing status, default single",
              "enum": [
                "single",
                "married_jointly",
                "married_separately",
                "head_of_household"
              ],
              "type": "string"
            },
            "gain": {
              "description": "Capital gain amount (>= 0)",
              "type": "number"
            },
            "holding_period": {
              "description": "long uses 0/15/20 rates; short uses ordinary rates",
              "enum": [
                "long",
                "short"
              ],
              "type": "string"
            },
            "ordinary_income": {
              "description": "Other taxable income, used to stack the gain into brackets",
              "type": "number"
            },
            "tax_year": {
              "description": "Tax year, default 2026",
              "type": "integer"
            }
          },
          "required": [
            "gain"
          ],
          "type": "object"
        },
        "type": {
          "const": "http",
          "type": "string"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}