Roundhouse AI

nichedata.dev

Pay-per-call niche demand and competition intelligence for Kindle Direct Publishing authors. $0.03 USDC per cached query, $0.10 USDC for live research. x402 micropayments, no API keys.

DataLiveeip155:8453Exactvia cdp
https://nichedata.dev/v1/niche/:keyword
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
$0.10
Verified settled volume
1 settlements proven x402 by their on-chain EIP-3009 marker.
$0.030
Listed price
As published in the catalog. Always read the live 402 before paying.
47
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-07-06 20:26Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x01387DF1570204A3470285D6FbcC191FBa2591C1

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.

Accepts

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

0.03USDC≈ $0.03 USD
on Base · exact scheme

Pay 0.03 USDC on Base to 0x0138…591C1. The signed payment is good for 5 minutes.

Paid to
0x0138…591C1
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
30000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x01387DF1570204A3470285D6FbcC191FBa2591C1",
    "amount": "30000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "pathParams": {
          "keyword": "menopause"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "keyword": "romance novels",
          "pricing": 3.99,
          "bsr_range": "1,000–5,000",
          "api_version": "0.2.0",
          "cache_status": "cached",
          "data_quality": "full",
          "demand_score": 87.5,
          "data_freshness": "2026-04-28T00:00:00Z",
          "query_cost_usdc": 0.03,
          "cache_expires_at": "2026-05-05T00:00:00Z",
          "review_threshold": 25,
          "competition_score": 72.3,
          "monthly_revenue_estimate": 3200
        }
      }
    },
    "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",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object",
              "required": [
                "keyword"
              ],
              "properties": {
                "keyword": {
                  "type": "string",
                  "examples": [
                    "romance novels",
                    "keto cookbook",
                    "dog training",
                    "coloring books for adults"
                  ],
                  "description": "KDP niche keyword to analyze (e.g. 'romance novels', 'keto cookbook', 'dog training')"
                }
              }
            },
            "queryParams": {
              "type": "object",
              "properties": {}
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "properties": {
                "keyword": {
                  "type": "string"
                },
                "pricing": {
                  "type": [
                    "number",
                    "null"
                  ]
                },
                "bsr_range": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "api_version": {
                  "type": "string"
                },
                "cache_status": {
                  "enum": [
                    "cached",
                    "live"
                  ],
                  "type": "string"
                },
                "data_quality": {
                  "enum": [
                    "full",
                    "partial",
                    "cached"
                  ],
                  "type": "string"
                },
                "demand_score": {
                  "type": "number",
                  "maximum": 100,
                  "minimum": 0
                },
                "data_freshness": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "query_cost_usdc": {
                  "type": "number"
                },
                "cache_expires_at": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "review_threshold": {
                  "type": [
                    "integer",
                    "null"
                  ]
                },
                "competition_score": {
                  "type": "number",
                  "maximum": 100,
                  "minimum": 0
                },
                "monthly_revenue_estimate": {
                  "type": [
                    "number",
                    "null"
                  ]
                }
              }
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/niche/:keyword"
  }
}

Provenance

Seen in the source catalog
2026-07-06 20:26Z
Last indexed by Roundhouse
2026-07-16 20:50Z
Last enriched (probe, favicon, geo)
2026-09-13 02:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 200
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

Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. 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 nichedata.dev 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=nichedata.dev'
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://nichedata.dev/v1/niche/:keyword, 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.