# Scro Orphan Desk Intent Echo API

**Canonical:** https://apis.io/apis/dualregistry-dev/intent-echo-api/  
**Provider:** Scro Orphan Desk — https://apis.io/providers/dualregistry-dev/  
**Base URL:** https://dualregistry.dev  
**Documentation:** https://dualregistry.dev/llms.txt

Scro Orphan Desk Intent Echo API is one of 2 APIs that [Scro Orphan Desk](https://apis.io/providers/dualregistry-dev/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 1 JSON Schema definition. Tagged areas include x402, DeFi, Intent Trading, and AI Agents. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, a getting-started guide, authentication docs, rate-limit docs, and 1 JSON Schema.

The desk's HTTP/JSON surface on https://dualregistry.dev, described by a served OpenAPI 3.0.3 stub of 7 operations (the provider's own ai-plugin calls it "minimal") and more fully by llms.txt: a free echo catalog (GET /index.json), pheromone stats (GET /stats.json), the x402 paywalled per-echo redeem (GET /api/echo?echo_id= — HTTP 402 invoice unless payment proof headers X-PAYMENT-TX + X-PAYMENT-CHAIN accompany the GET; ?preview=1 is a free redacted preview), OBO fee negotiation (POST /api/quote_fee, /api/counter_fee — exploratory quotes free, firm accept answers 402), manual settlement attestation (POST /api/settle_fee), structured agent feedback (POST /api/feedback) and the flat-priced OrphanDust unlock credits (GET/POST /api/orphandust/buy answers 402 for od_unlock_050 at 0.50 USDC on Base). No authentication; the paywall is the access control. Rate limits published as ~10 requests / 10 minutes on the quote endpoints and 5 / 10 minutes on feedback.

## Operations (7)

| Method | Path | Summary |
|---|---|---|
| GET | `/index.json` | List open Echoes |
| GET | `/stats.json` | Read pheromone stats |
| GET | `/api/echo` | Redeem Echo |
| POST | `/api/quote_fee` | Request OBO fee quote |
| POST | `/api/settle_fee` | Settle fee |
| GET | `/api/orphandust/buy` | HTTP 402 invoice for od_unlock_050 ($0.50 USDC Base) |
| POST | `/api/orphandust/buy` | Buy unlock credits |

## Machine-readable artifacts (15)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/openapi/dualregistry-dev-openapi.yml
- **OpenAPI** — https://dualregistry.dev/openapi.json
- **Documentation** — https://dualregistry.dev/llms.txt
- **GettingStarted** — https://dualregistry.dev/AGENT.md
- **JSONSchema** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/json-schema/dualregistry-dev-fee-quote.schema.json
- **Authentication** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/authentication/dualregistry-dev-authentication.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/conventions/dualregistry-dev-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/errors/dualregistry-dev-problem-types.yml
- **DataModel** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/data-model/dualregistry-dev-data-model.yml
- **Examples** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/examples/dualregistry-dev-examples.yml
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/overlays/dualregistry-dev-openapi-overlay.yaml
- **RateLimits** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/rate-limits/dualregistry-dev-rate-limits.yml
- **Lifecycle** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/lifecycle/dualregistry-dev-lifecycle.yml
- **ToolCrosswalk** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/mcp/dualregistry-dev-tool-crosswalk.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/dualregistry-dev/refs/heads/main/apis.yml

## Other Scro Orphan Desk APIs (1)

- [Scro Orphan Desk A2A agent card](https://apis.io/apis/dualregistry-dev/a2a-agent/)

## Tags

x402, DeFi, Intent Trading, AI Agents

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