Scro Orphan Desk

Scro Orphan Desk Intent Echo API

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.

Documentation GitHub OpenAPI

Operations 7

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 #

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OpenAPI Specification

openapi: 3.0.3
info:
  title: Scro Orphan Desk API
  version: 1.2.0
  description: Machine-only Resurrection Echo API with x402 paywall.
  x-apievangelist-refined:
    generated: '2026-09-19'
    method: searched
    source: https://dualregistry.dev/openapi.json (verbatim copy at openapi/_original/dualregistry-dev-openapi.json)
    changes:
    - operationId added to all 7 operations (the served document has none) — ids are pipeline-assigned and are the
      ones skills/, mcp/ and conventions/ reference
    - tags added and declared (Echoes, Stats, Fees, OrphanDust)
    - 'GET /api/orphandust/buy: the served document declares no responses; a 402 is recorded here because an unauthenticated
      GET on 2026-09-19 returned HTTP 402 with an x402 v1 body and PAYMENT-REQUIRED header'
    - 'nothing else changed: no paths, parameters, schemas or security added — the served spec omits the documented
      /api/counter_fee, /api/fee_quote, /api/feedback, /api/orphandust/unlock, /*.echo.json, /preview/{id}, /fill_hint.json,
      /PROMO.json and /ORPHANDUST.json surfaces, and this copy does not add them (see overlays/ and conventions/)'
servers:
- url: https://dualregistry.dev
tags:
- name: Echoes
  description: Open Intent Echoes — free catalog, x402-paywalled per-echo redeem
- name: Stats
  description: Pheromone stats
- name: Fees
  description: OBO fee quote and settlement
- name: OrphanDust
  description: Flat-priced unlock credits (x402)
paths:
  /index.json:
    get:
      summary: List open Echoes
      responses:
        '200':
          description: Echo catalog
      operationId: listEchoes
      tags:
      - Echoes
  /stats.json:
    get:
      summary: Read pheromone stats
      responses:
        '200':
          description: Stats
      operationId: getStats
      tags:
      - Stats
  /api/echo:
    get:
      summary: Redeem Echo
      responses:
        '200':
          description: Full Echo
        '402':
          description: x402 payment required
      operationId: redeemEcho
      tags:
      - Echoes
  /api/quote_fee:
    post:
      summary: Request OBO fee quote
      responses:
        '200':
          description: Counter or indicative quote
        '402':
          description: Payment required
      operationId: quoteFee
      tags:
      - Fees
  /api/settle_fee:
    post:
      summary: Settle fee
      responses:
        '200':
          description: Receipt
      operationId: settleFee
      tags:
      - Fees
  /api/orphandust/buy:
    get:
      summary: HTTP 402 invoice for od_unlock_050 ($0.50 USDC Base)
      operationId: getOrphanDustInvoice
      tags:
      - OrphanDust
      responses:
        '402':
          description: 'x402 payment required (observed live 2026-09-19: HTTP 402, application/json x402 v1 invoice
            with accepts[], PAYMENT-REQUIRED header)'
    post:
      summary: Buy unlock credits
      responses:
        '200':
          description: Credits
        '402':
          description: Payment required
      operationId: buyOrphanDustCredits
      tags:
      - OrphanDust

Scro Orphan Desk Intent Echo API

Operations 7

Documentation

Specifications

Schemas & Data

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