REST · OpenAPI 3.1

La API de contratos gubernamentales, con paridad total.

Every screen on Sell to State is backed by a documented REST endpoint under /api/v1. Search, drill into a buyer or supplier, export CSV, and keep saved lists — with one API key and the same paywall the MCP server and CLI share.

Full reference → MCP server

# Guía rápida de 60 segundos

# 1. Create a key in the dashboard
#    Account → API keys
# 2. Verify it
curl -s https://app.selltostate.com/api/v1/whoami \
  -H "x-api-key: sts_xxxxxxxx"

# 3. Search
curl -s "https://app.selltostate.com/api/v1/search\
?scope=tenders&q=cybersecurity" \
  -H "x-api-key: sts_xxxxxxxx"

Same key works for the MCP server and the selltostate CLI.

Autenticación y el muro de pago 402

Two credential types resolve to one entitlement check. Humans and backends send an API key as x-api-key: sts_…. Autonomous agents self-register over RFC 7591 DCR and present Authorization: Bearer client:<id>.

Until your subject has an active subscription, every data call returns 402 with a payment_link (humans) and a machine_payment affordance (agents can pay off-session via POST /api/v1/pay and continue without a browser). GET /api/v1/whoami is the exception — it returns 200 with active:false so you can decide to pay before doing work.

Plan caps: monthly and annual = 5,000 rows/page; the 3-day pass = 10,000 rows in total. Rate limit: 120 data calls/min per credential (faceted search has its own 300/min budget). Saved lists and saved searches are owner-scoped — they require a user x-api-key; an OIDC client token gets 403.

Endpoints.

All under /api/v1. Full params, schemas and "Try it" live in the reference.

GET /api/v1/whoami Autenticación + derechos + ámbitos (scopes). Devuelve 200 active:false (no 402) para una clave válida pero sin suscripción — verifícalo antes de consumir.

GET /api/v1/search Búsqueda facetada con Typesense sobre un único ámbito (tenders | buyers | suppliers | sectors): resultados + recuentos por faceta + paginación.

GET /api/v1/awards Filas de adjudicación paginadas y filtrables, ordenadas por importe. CSV en /api/v1/awards.csv.

GET /api/v1/buyers/{slug} Detalle del comprador (organismo): resumen, tendencia de gasto anual, distribución por sector, principales proveedores.

GET /api/v1/suppliers/{slug} Detalle del proveedor: resumen, tendencia de adjudicaciones anuales, distribución por sector, principales compradores.

GET /api/v1/sectors/{slug} Detalle del sector: resumen, tendencia anual, socios activos (?kind=buyers|suppliers).

GET /api/v1/tenders/{id} Adjudicación única por id numérico o id público de licitación, más adjudicaciones relacionadas.

CRUD /api/v1/lists* Listas de adjudicaciones guardadas. Con ámbito por propietario — requiere una x-api-key de usuario.

CRUD /api/v1/saved-searches* Búsquedas guardadas. Con ámbito por propietario — requiere una x-api-key de usuario.

Ejemplos.

Python — buscar adjudicaciones

import requests

H = {"x-api-key": "sts_xxxxxxxx"}
r = requests.get(
    "https://app.selltostate.com/api/v1/search",
    params={"scope": "tenders", "q": "cybersecurity", "year_min": 2023},
    headers=H,
)
if r.status_code == 402:
    print("subscribe:", r.json()["payment_link"]); raise SystemExit
data = r.json()
print(data["found"], "matches")
for hit in data["hits"]:
    print(hit)

Node — detalle de comprador + exportación CSV

const H = { "x-api-key": process.env.STS_API_KEY };

const buyer = await fetch(
  "https://app.selltostate.com/api/v1/buyers/ministry-of-education",
  { headers: H },
).then((r) => r.json());
console.log(buyer.buyer, buyer.yearly);

// Stream the entitlement-capped CSV
const csv = await fetch(
  "https://app.selltostate.com/api/v1/awards.csv?supplier=ACME",
  { headers: H },
).then((r) => r.text());

Listas guardadas (clave de usuario)

# Create a list, add a tender, read it back
LID=$(curl -s -X POST https://app.selltostate.com/api/v1/lists \
  -H "x-api-key: sts_xxxxxxxx" -H "content-type: application/json" \
  -d '{"name":"Cyber FY24"}' | jq -r .id)

curl -s -X POST https://app.selltostate.com/api/v1/lists/$LID/items \
  -H "x-api-key: sts_xxxxxxxx" -H "content-type: application/json" \
  -d '{"tender_no":"MOE000ETT24300001"}'

Poll for new tenders.

A job in your scheduler, Zapier or n8n can ask for the tenders added to Sell to State since its last run. Keep the time of each run and send it as added_after. Remove duplicates by slug.

LAST=$(cat last_run 2>/dev/null || echo 0)
NOW=$(date +%s)
curl -s "https://app.selltostate.com/api/v1/search?scope=tenders&country=united-kingdom&q=software&sort=added_desc&added_after=$LAST&per_page=50"   -H "x-api-key: sts_xxxxxxxx"
echo "$NOW" > last_run

Param	Values
`sort`	`added_desc` (newest in Sell to State first), `published_desc` (newest publish date first), `deadline`, `relevance`
`added_after`	Unix seconds. Only tenders added after this time.
`published_days`	`1`, `7`, `30`, `90`, `365`

The search limit is 300 calls a minute per key. A poll every 5 minutes or more is enough for tenders. Integrations

Obtén una clave de API.

Pick a plan, create a key under Account → API keys, and you're querying in minutes. The full reference — every parameter, response schema, and a live "Try it" — is at docs.selltostate.com.

Start for free →