# Colombian Company Lookup API (RUES / Confecámaras NIT)

**FactStamp** (`agents.factstamp.dev`) offers a deterministic Colombian company verification API and MCP tool backed directly by [RUES (Registro Único Empresarial y Social / Confecámaras)](https://www.rues.org.co/)—an uncontested register with zero competing listings in the Coinbase x402 Bazaar index. Every lookup returns a primary-register verdict (`verified`, `stale`, `contradicted`, or `unknown`), explicit `not_consulted` disclosure, and an offline-verifiable **Ed25519-signed receipt**. Access Colombia RUES via the **Colombia RUES Stripe Pack (A$129 AUD)** or pay-per-call x402 USDC on Base with no annual enterprise commitment.

## Verify a Colombian NIT or Company (WebMCP-Enabled)

Tool: `factstamp_lookup_co_rues` — Use when an agent or user needs to verify a Colombian company NIT or legal name against RUES (Confecámaras) and receive an Ed25519-signed receipt.

Submits: `GET https://agents.factstamp.dev/verify/entity`

- **Colombian NIT or Company Name:**
- `q` — `text, required`, placeholder `e.g. 900123456`
- `country` — `hidden`, value `CO`
- **Submit:** Mint Signed RUES Receipt

## Why FactStamp for Colombian KYB & Agent Workflows

| Capability | FactStamp RUES | Legacy Global Aggregators ([OpenCorporates](https://opencorporates.com/pricing/)) |
| --- | --- | --- |
| **Pricing** | A$129 Stripe Pack or pay-per-call USDC (no annual lock-in) | £2,250/yr+ enterprise subscription |
| **MCP / Agent Native** | Streamable HTTP MCP + WebMCP + `llms.txt` | REST only, no MCP or x402 rail |
| **Offline Proof** | Ed25519 receipt (`factstamp-receipt-v2`) | Unsigned API response |

Test an offline receipt at `GET https://agents.factstamp.dev/receipt/selftest` or view full pack details in [pricing.md](https://agents.factstamp.dev/pricing.md).