# SiteSignal Grant Readiness Checklist

> SiteSignal Grant Readiness Checklist is a paid API for AI agents from trinity-throw-thursday-gravity.trycloudflare.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Converts a single Grants.gov opportunity into a structured, evidence-linked application-readiness checklist covering deadlines, eligibility, registrations, budget, attachments, and agency contact information.

## Facts

- Endpoint: GET https://trinity-throw-thursday-gravity.trycloudflare.com/x402/grant-checklist
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitesignal-grant-readiness-checklist-d2d9943a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xOZZAH8febkIvgwngfLJ6

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sitesignal-grant-readiness-checklist-d2d9943a
```

Example prompt: Can you pull up a grant readiness checklist for Grants.gov opportunity 347821? We're a nonprofit, our project budget is $250,000, and we need at least 30 days to prepare our application.

## When to prefer this

Use this endpoint when you have a specific Grants.gov opportunity ID and need a comprehensive, structured readiness checklist rather than a broad search or eligibility screen. It is more detailed than a simple eligibility brief and is ideal when an applicant organization is actively preparing to apply and needs actionable to-do items across all application dimensions (registrations, budget, attachments, deadlines). Prefer this over the Grant Eligibility Brief when you need the full checklist output, not just a fit/conflict summary.

## Known failure modes

- Invalid or non-existent opportunity_id returns an error or empty result
- Opportunity has closed or been archived, returning stale or unavailable data
- Grants.gov upstream API unavailability causing fetch failure
- Malformed opportunity_id (non-numeric or exceeding 12 digits) rejected by schema validation
- Extremely large or complex grant opportunity may result in incomplete checklist generation

## How this service works

Turn one Grants.gov opportunity into an evidence-linked application-readiness checklist covering deadline, eligibility, registrations, budget, attachments, and agency contact.

## Output

A structured, evidence-linked checklist covering the opportunity's deadline and time-to-apply feasibility, applicant eligibility criteria, required system registrations (e.g. SAM.gov), budget parameters and cost-share requirements, mandatory attachments, and relevant agency contact details — all sourced from the Grants.gov opportunity record.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "opportunity_id"
     ],
     "properties": {
      "profile": {
       "type": "string",
       "maxLength": 800
      },
      "eligibility": {
       "type": "string",
       "maxLength": 200
      },
      "opportunity_id": {
       "type": "string",
       "pattern": "^[0-9]{1,12}$"
      },
      "project_budget_usd": {
       "type": "number",
       "minimum": 1
      },
      "days_needed_to_apply": {
       "type": "integer",
       "default": 21,
       "maximum": 180,
       "minimum": 1
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitesignal-grant-readiness-checklist-d2d9943a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from trinity-throw-thursday-gravity.trycloudflare.com](https://www.zero.xyz/host/trinity-throw-thursday-gravity.trycloudflare.com/llms.txt)