Forecast backtest (MAPE + RMSE)

Name: Forecast backtest (MAPE + RMSE)
Price: 0.001 USDC
Availability: InStock

Backtest a forecasting method on the input series by holding out the last `testSize` observations, forecasting them, and computing MAPE (mean absolute percentage error) + RMSE (root mean squared error). Lets an agent pick which method (mean / naive / drift / ses / holt / holt-winters) actually fits its data before committing to a forward forecast.

DataLiveeip155:8453Exactvia cdp

https://agent402.tools/api/forecast-eval

DataForecastBacktestEvaluationMape

Calls · 30d

5↑ 11%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 24 snapshots so far.

$48.55

Verified settled volume

A floor: summed over 5,000 of 31,792 verified settlements.

$0.0010

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 2026-09-21 11:12Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xaBF4FAbd7c416fB67202E5f9002389Fc75e2a9D0

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.

{
  "altPayment": {
    "info": "https://agent402.tools/api/pow",
    "summary": "No wallet? This tool is also payable with a few ms of CPU: solve a sha256 puzzle instead - no money, no tokens.",
    "protocol": "proof-of-work",
    "challengeUrl": "https://agent402.tools/api/pow/challenge?slug=forecast-eval"
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.001USDC≈ $0.001 USD

on Base · exact scheme

Pay 0.001 USDC on Base to 0xaBF4…2a9D0. The signed payment is good for 5 minutes.

Paid to: 0xaBF4…2a9D0
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 1000 smallest units

1000units

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: 0xaBF4…2a9D0
Token contract: 0x3c49…c3359
Payment window: 5 minutes

1000units

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: 0xaBF4…2a9D0
Token contract: 0xaf88…e5831
Payment window: 5 minutes

1000units

on eip155:143 · 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: 0xaBF4…2a9D0
Token contract: 0x7547…fb603
Payment window: 5 minutes

1000units

on eip155:43114 · 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: 0xaBF4…2a9D0
Token contract: 0xB97E…48a6E
Payment window: 5 minutes

1000units

on eip155:1329 · 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: 0xaBF4…2a9D0
Token contract: 0xe15f…42392
Payment window: 5 minutes

2000units

on Optimism · 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: 0xaBF4…2a9D0
Token contract: 0x0b2C…7Ff85
Payment window: 5 minutes

1000units

on eip155:4663 · 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: 0xaBF4…2a9D0
Token contract: 0x5fc5…1d168
Payment window: 5 minutes

1000units

on eip155:42220 · 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: 0xaBF4…2a9D0
Token contract: 0xcebA…2118C
Payment window: 5 minutes

0.001USDC≈ $0.001 USD

on Base · upto scheme

Pay 0.001 USDC on Base to 0xaBF4…2a9D0. The signed payment is good for 5 minutes.

Paid to: 0xaBF4…2a9D0
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 1000 smallest units

1000units

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: J7aN3P…v3xwg
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

10000units

on stellar:pubnet · 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: GDNJXC…JWWRL
Token contract: CCW67T…JMI75
Payment window: 5 minutes

1000units

on algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8= · 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: C7IIHG…Y2XIE
Token contract: 31566704
Payment window: 5 minutes

The catalog’s raw entry

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    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "outputSchema": {
      "type": "object",
      "required": [
        "method",
        "n",
        "testSize",
        "trainSize",
        "mape",
        "rmse",
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        "warnings"
      ],
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    "scheme": "upto",
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]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "method": "drift",
          "values": [
            10,
            12,
            13,
            12,
            15,
            16,
            18,
            19,
            21,
            22
          ],
          "testSize": 3
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "n": 10,
          "mape": 1.1139,
          "rmse": 0.2722,
          "method": "drift",
          "forecast": [
            {
              "step": 1,
              "actual": 19,
              "predicted": 19.3333
            },
            {
              "step": 2,
              "actual": 21,
              "predicted": 20.6667
            },
            {
              "step": 3,
              "actual": 22,
              "predicted": 22
            }
          ],
          "testSize": 3,
          "warnings": [],
          "trainSize": 7
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "required": [
                "values",
                "testSize",
                "method"
              ],
              "properties": {
                "beta": {
                  "type": "number",
                  "description": "Trend smoothing for holt/holt-winters"
                },
                "alpha": {
                  "type": "number",
                  "description": "Smoothing for ses/holt/holt-winters"
                },
                "gamma": {
                  "type": "number",
                  "description": "Seasonal smoothing for holt-winters"
                },
                "method": {
                  "type": "string",
                  "description": "\"mean\", \"naive\", \"drift\", \"ses\", \"holt\", \"holt-winters\""
                },
                "period": {
                  "type": "number",
                  "description": "Seasonal period for holt-winters (auto-detected if omitted)"
                },
                "values": {
                  "type": "array",
                  "description": "Numeric series (max 10000)"
                },
                "testSize": {
                  "type": "number",
                  "description": "Trailing observations to hold out (1 to values.length - 2). Values above n/2 trigger a warning, not an error."
                },
                "seasonality": {
                  "type": "string",
                  "description": "\"additive\" or \"multiplicative\" for holt-winters"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "method",
                "n",
                "testSize",
                "trainSize",
                "mape",
                "rmse",
                "forecast",
                "warnings"
              ],
              "properties": {
                "n": {
                  "type": "integer"
                },
                "mape": {
                  "type": "number"
                },
                "rmse": {
                  "type": "number"
                },
                "method": {
                  "type": "string"
                },
                "forecast": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "properties": {
                      "step": {
                        "type": "integer"
                      },
                      "actual": {
                        "type": "integer"
                      },
                      "predicted": {
                        "type": "number"
                      }
                    }
                  }
                },
                "testSize": {
                  "type": "integer"
                },
                "warnings": {
                  "type": "array"
                },
                "trainSize": {
                  "type": "integer"
                }
              }
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "bc_b4aw4uzd"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
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        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
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            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  },
  "payment-identifier": {
    "info": {
      "required": false
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "required"
      ],
      "properties": {
        "id": {
          "type": "string",
          "pattern": "^[a-zA-Z0-9_-]+$",
          "maxLength": 128,
          "minLength": 16
        },
        "required": {
          "type": "boolean"
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-09-21 11:12Z
Last indexed by Roundhouse: 2026-09-24 21:00Z
Last enriched (probe, favicon, geo): 2026-09-11 06:15Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

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. 24 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 Forecast backtest (MAPE + RMSE) 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=Forecast%20backtest%20(MAPE%20%2B%20RMSE)'
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://agent402.tools/api/forecast-eval, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

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