# Countersignatory API

**Canonical:** https://apis.io/apis/countersignatory-com/countersignatory-api/  
**Provider:** Countersignatory — https://apis.io/providers/countersignatory-com/  
**Base URL:** https://countersignatory.com/v1  
**Documentation:** https://countersignatory.com/llms.txt

Countersignatory API is published by [Countersignatory](https://apis.io/providers/countersignatory-com/) on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 2 JSON Schema definitions. Tagged areas include Human-in-the-Loop, AI Agents, and x402. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, and 2 JSON Schemas.

JSON API for the Countersignatory Spot Index, task quotes, orders and x402 payment, as documented in the provider's llms.txt.

## Operations (2)

| Method | Path | Summary |
|---|---|---|
| POST | `/v1/orders` | POST /v1/orders |
| POST | `/v1/quotes` | POST /v1/quotes |

## Machine-readable artifacts (6)

- **OpenAPI** — https://artifacts.apis.io/countersignatory-com/openapi/_ae-authored/countersignatory-com-openapi-generated.yml
- **Documentation** — https://countersignatory.com/llms.txt
- **APIReference** — https://countersignatory.com/v1
- **JSONSchema** — https://artifacts.apis.io/countersignatory-com/json-schema/countersignatory-com-post-v1-orders-request-schema.json
- **JSONSchema** — https://artifacts.apis.io/countersignatory-com/json-schema/countersignatory-com-post-v1-quotes-request-schema.json
- **APIsJSON** — https://artifacts.apis.io/countersignatory-com/apis.yml

## Tags

Human-in-the-Loop, AI Agents, x402

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/countersignatory-com/countersignatory-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/countersignatory-com/.