# Vextorium US Federal Grant Search

> Vextorium US Federal Grant Search is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-20).

Search US federal grant opportunities from Grants.gov by keyword and/or agency, returning title, number, agency, open/close dates, status, and direct link

## Facts

- Endpoint: POST https://api.vextorium.com/subvenciones-eeuu-pago?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-us-federal-grant-search-001af8a4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HN0Ymq-NyJZ3o9nyftxOI

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 vextorium-us-federal-grant-search-001af8a4 -d '<json body>'
```

Example prompt: Can you find me up to 20 open federal grant opportunities related to 'clean energy' from the DOE on Grants.gov?

## When to prefer this

Use this endpoint when you need to search US federal grant opportunities directly from Grants.gov with filtering by keyword, agency, and open/forecasted status. Prefer this over generic web search when you need structured data (grant numbers, dates, links) rather than unstructured text, and when you want to programmatically process or display grant listings in an agent workflow.

## Known failure modes

- No grants found matching the keyword/agency combination — returns empty convocatorias array
- Invalid agency code or name yields no results
- Network timeout when Grants.gov is slow or unavailable
- Missing required input body fields causes request error
- Forecasted grants may lack close dates (null cierre)

## How this service works

US federal grant opportunities from Grants.gov: title, number, agency, open and close dates, status and link; search by keyword (AI, energy, health...) and agency (NSF, NIH, DOE...), open or forecasted.

## Output

Returns a JSON object with the total count of matching grants, the search term used, agency filter applied, status filter, source (Grants.gov), and an array of grant convocatorias each containing: title, grant number, agency name, agency code, open date (apertura), close date (cierre), current status, and a direct link to the opportunity.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "buscar": {
   "type": "string"
  },
  "estado": {
   "enum": [
    "abiertas",
    "previstas",
    "todas"
   ],
   "type": "string"
  },
  "limite": {
   "type": "integer"
  },
  "agencia": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-us-federal-grant-search-001af8a4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)