api.signalfuse.co

Name: api.signalfuse.co
Price: 0.015 USDC
Availability: InStock

11 MCP tools for autonomous trading agents. Real-time signals, sentiment, macro regime, web search, code execution. Pay per call with USDC on Base — no API keys needed.

SearchLiveeip155:8453Exactvia cdp

https://api.signalfuse.co/v1/gateway/search

Calls · 30d

4↑ 3.7%

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

$13.70

Verified settled volume

1,151 settlements proven x402 by their on-chain EIP-3009 marker.

$0.015

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 2026-09-15 16:01Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xf080a1Aab08650946acDa41410a7eDC14f7Be035

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",
  "price": "$0.015",
  "endpoint": "/v1/gateway/search",
  "how_to_pay": {
    "option_1": {
      "docs": "https://api.signalfuse.co/.well-known/x402",
      "method": "x402 micropayment",
      "protocol": "Attach USDC payment on Base (eip155:8453) per x402 spec"
    },
    "option_2": {
      "method": "Credit token",
      "step_1": "POST https://api.signalfuse.co/v1/credits/trial with {\"wallet\": \"0x...\"}  (5 free credits)",
      "step_2": "Add header: x-credit-token: <token from step 1>",
      "step_3": "Retry this request"
    },
    "option_3": {
      "url": "https://signalfuse.co/play",
      "method": "Browser playground (no setup)",
      "description": "Try every paid endpoint from your browser. 25 free calls per day, no wallet, no signup."
    }
  },
  "playground_url": "https://signalfuse.co/play",
  "sample_response": {
    "count": "[paid] — deduplicated across Brave + Tavily",
    "results": [
      {
        "url": "https://example.com",
        "title": "Sample headline",
        "content": "[paid]",
        "sources": [
          "brave",
          "tavily"
        ]
      }
    ]
  },
  "free_alternatives": {
    "/v1/health": "Service status — free",
    "/v1/regime/preview": "Regime + confidence (no reasoning) — free",
    "/v1/arena/leaderboard": "Strategy performance — free"
  }
}

Accepts

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

0.015USDC≈ $0.015 USD

on Base · exact scheme

Pay 0.015 USDC on Base to 0xf080…Be035. The signed payment is good for 5 minutes.

Paid to: 0xf080…Be035
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 15000 smallest units
Returns: application/json

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xf080a1Aab08650946acDa41410a7eDC14f7Be035",
    "amount": "15000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.signalfuse.co/v1/gateway/search",
    "description": "",
    "outputSchema": {
      "input": {
        "type": "http",
        "method": "POST",
        "schema": {
          "type": "object",
          "required": [
            "query"
          ],
          "properties": {
            "query": {
              "type": "string",
              "description": "Search query"
            },
            "max_results": {
              "type": "integer",
              "default": 10,
              "maximum": 20
            }
          }
        }
      },
      "output": {
        "type": "json",
        "example": {
          "query": "bitcoin ETF approval",
          "total": 12,
          "results": [
            {
              "url": "https://example.com/article",
              "score": 0.92,
              "title": "SEC approves spot Bitcoin ETF",
              "source": "tavily",
              "snippet": "...",
              "confirmed_by": "both"
            }
          ],
          "deduplicated": 3,
          "sources_queried": [
            "brave",
            "tavily"
          ]
        }
      }
    },
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "POST",
        "schema": {
          "type": "object",
          "required": [
            "query"
          ],
          "properties": {
            "query": {
              "type": "string",
              "description": "Search query"
            },
            "max_results": {
              "type": "integer",
              "default": 10,
              "maximum": 20
            }
          }
        }
      },
      "output": {
        "type": "json",
        "example": {
          "query": "bitcoin ETF approval",
          "total": 12,
          "results": [
            {
              "url": "https://example.com/article",
              "score": 0.92,
              "title": "SEC approves spot Bitcoin ETF",
              "source": "tavily",
              "snippet": "...",
              "confirmed_by": "both"
            }
          ],
          "deduplicated": 3,
          "sources_queried": [
            "brave",
            "tavily"
          ]
        }
      }
    },
    "schema": {
      "output": {
        "required": [
          "query",
          "results",
          "total"
        ],
        "properties": {
          "query": {
            "type": "string"
          },
          "total": {
            "type": "integer"
          },
          "results": {
            "type": "array",
            "items": {
              "type": "object",
              "required": [
                "title",
                "url",
                "source"
              ],
              "properties": {
                "url": {
                  "type": "string",
                  "format": "uri"
                },
                "score": {
                  "type": "number"
                },
                "title": {
                  "type": "string"
                },
                "source": {
                  "enum": [
                    "brave",
                    "tavily"
                  ],
                  "type": "string"
                },
                "snippet": {
                  "type": "string"
                },
                "confirmed_by": {
                  "enum": [
                    "both"
                  ],
                  "type": "string"
                }
              }
            }
          },
          "deduplicated": {
            "type": "integer"
          },
          "sources_queried": {
            "type": "array",
            "items": {
              "type": "string"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog: 2026-09-15 16:01Z
Last indexed by Roundhouse: 2026-09-24 11:10Z
Last enriched (probe, favicon, geo): 2026-09-20 15:45Z
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. 30 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 api.signalfuse.co 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=api.signalfuse.co'
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://api.signalfuse.co/v1/gateway/search, 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.