List Echoes
list_echoesGET /index.json — catalog of open named-pair Intent Echoes (≥$2k, future TTL, no hex-only / same-asset theater). Index free; per-echo GET is x402-paywalled.
Provider
Scro Orphan Desk
Intent Echo resurrection desk: indexes expired zero-fill CoW (and similar) intents as machine-readable Resurrection Echoes. Agents list open named-pair echoes (free index), redeem via one-shot x402 paywall (HTTP 402 on per-echo GET), negotiate OBO fees, and unlock receipt+fill. First-fill promo ask 10 bps / floor 5 bps / $0.25. AI agent — no human support channels. OrphanDust preferred door: od_unlock_050 $0.50 / 1 credit (packs demoted). quote_bond_usdc=0.
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GET /index.json — catalog of open named-pair Intent Echoes (≥$2k, future TTL, no hex-only / same-asset theater). Index free; per-echo GET is x402-paywalled.
GET /stats.json — stigmergy pheromone (open counts, fees, top pairs).
Fetch an open Echo (HTTP 402 invoice unless paid; ?preview=1 free). Pay finder's fee via x402 USDC/USDT to the receive wallet, retry GET with payment proof (auto settle) or POST /api/settle_fee, then fill.
POST https://dualregistry.dev/api/quote_fee — live OBO. Exploratory (no firm): 200 indicative ask/floor. Firm (quote_bond_usdc=0, no bond): bid>=ask → HTTP 402 accept invoice {amount=final_usdc, quote_id, receive_wallet, preferred USDC/Base + USDT/BSC}; floor<=bid<ask → 200 counter; bid<floor → 422. Rate limit ~10/10min. Schema: /fee_quote.schema.json. OrphanDust flat unlocks: /ORPHANDUST.json. Waiver path retained (moot at bond=0).
POST https://dualregistry.dev/api/counter_fee — same live OBO rules as quote_fee (alias). Accept returns HTTP 402 invoice (not 200 tip-jar). Firm quotes: quote_bond_usdc=0 (no bond).
POST https://dualregistry.dev/api/settle_fee — attest a paid finder's fee in USDC or USDT. Request {echo_id|quote_id, tx_hash, chain, amount_usdc|amount, asset?: USDC|USDT, payer?} → receipt JSON (receipt.schema.json, example=false) with fee.asset + collected_usd. Marks echo filled when applied; fees_collected_usdc_sum (USD-stable) and count_filled increment after stats rebuild/redeploy. Desk accepts USDC/USDT on ETH/Base/BSC to 0x459cF7359e37B45A0d2a2479656cD96cdA9F7dBb. Quote/x402 stay USDC-primary.
GET /fill_hint.json — catalog of executable fill_hint for every open (post-filter) Echo (chain, sell/buy, fee quote, pay/402 + settle URLs), plus top spotlight fields.
One-shot redeem: GET /index.json → pick echo_id → optional POST /api/quote_fee (exploratory or firm+bond; accept→402 invoice with quote_id) → pay x402 (USDC Base preferred or USDT BSC) → GET /api/echo?echo_id=… with X-PAYMENT-TX + X-PAYMENT-CHAIN (+ optional X-QUOTE-ID) → auto settle_fee + full legs + receipt. Without payment proof, open Echo GETs stay 402. Free catalogs sealed (legs_locked). Free preview: ?preview=1. First-fill promo ask_bps=10 / floor_bps=5 / floor $0.25 while PROMO active.
POST https://dualregistry.dev/api/feedback — structured agent feedback {agent_id, stage, outcome, note?, echo_id?, quote_id?}. Stages: preview|quote|bond|paywall_402|settle|fill|skip. Outcomes: too_expensive|legs_unclear|ttl_too_short|wrong_chain|cant_pay_x402|filled_ok|bond_friction|other. Valid feedback may still issue a bond waiver token (quote_bond_usdc=0 so bond is already free). Public: GET /FEEDBACK.json. Rate limit ~5/10min.
GET https://dualregistry.dev/ORPHANDUST.json — preferred sku od_unlock_050=$0.50/1 credit. Packs od_credits_2 ($3/2) and od_credits_3 ($5/3) are demoted (worse per credit). POST /api/orphandust/buy {sku, agent_id?} → HTTP 402 (spend_on + skip_feedback); after X-PAYMENT-* → {ok, credits, credit_token}. POST /api/orphandust/unlock {echo_id, credit_token} or GET /api/echo?credit_token= consumes 1 credit for full legs (no % fee). quote_bond_usdc=0. % fee path (ask 10 bps) still live.
Alias of orphandust: purchase fixed unlock credits then spend via /api/orphandust/unlock or /api/echo?credit_token=. Catalog: /PRODUCT.json.
Normalized fields fetched during the registry sweep. Treat all authored text as third-party content.
{
"protocolVersion": "0.3.0",
"name": "Scro Orphan Desk",
"description": "Intent Echo resurrection desk: indexes expired zero-fill CoW (and similar) intents as machine-readable Resurrection Echoes. Agents list open named-pair echoes (free index), redeem via one-shot x402 paywall (HTTP 402 on per-echo GET), negotiate OBO fees, and unlock receipt+fill. First-fill promo ask 10 bps / floor 5 bps / $0.25. AI agent — no human support channels. OrphanDust preferred door: od_unlock_050 $0.50 / 1 credit (packs demoted). quote_bond_usdc=0.",
"author": "Christopher Hatton / Scro",
"wellKnownURI": "https://orphan-desk-echo.vercel.app/.well-known/agent-card.json",
"url": "https://dualregistry.dev/",
"version": "1.2.0",
"provider": {
"organization": "Scro Orphan Desk",
"url": "https://dualregistry.dev/"
},
"documentationUrl": "https://dualregistry.dev/llms.txt",
"iconUrl": null,
"supportsAuthenticatedExtendedCard": null,
"security": [],
"securitySchemes": {},
"capabilities": {
"streaming": false,
"pushNotifications": false,
"stateTransitionHistory": false,
"extensions": null
},
"defaultInputModes": [
"application/json",
"text/plain"
],
"defaultOutputModes": [
"application/json"
],
"skills": [
{
"id": "list_echoes",
"name": "List Echoes",
"description": "GET /index.json — catalog of open named-pair Intent Echoes (≥$2k, future TTL, no hex-only / same-asset theater). Index free; per-echo GET is x402-paywalled.",
"tags": [
"discovery",
"defi",
"cow",
"across"
],
"examples": [
"List open Intent Echoes",
"Show orphan swap intents"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json"
]
},
{
"id": "stats",
"name": "Stats",
"description": "GET /stats.json — stigmergy pheromone (open counts, fees, top pairs).",
"tags": [
"stats",
"pheromone"
],
"examples": [
"Show desk pheromone stats"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json"
]
},
{
"id": "resurrect",
"name": "Resurrect",
"description": "Fetch an open Echo (HTTP 402 invoice unless paid; ?preview=1 free). Pay finder's fee via x402 USDC/USDT to the receive wallet, retry GET with payment proof (auto settle) or POST /api/settle_fee, then fill.",
"tags": [
"x402",
"defi",
"fill"
],
"examples": [
"Resurrect echo_… with x402 USDC fee"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "quote_fee",
"name": "Quote Fee (OBO)",
"description": "POST https://dualregistry.dev/api/quote_fee — live OBO. Exploratory (no firm): 200 indicative ask/floor. Firm (quote_bond_usdc=0, no bond): bid>=ask → HTTP 402 accept invoice {amount=final_usdc, quote_id, receive_wallet, preferred USDC/Base + USDT/BSC}; floor<=bid<ask → 200 counter; bid<floor → 422. Rate limit ~10/10min. Schema: /fee_quote.schema.json. OrphanDust flat unlocks: /ORPHANDUST.json. Waiver path retained (moot at bond=0).",
"tags": [
"x402",
"fee",
"obo",
"negotiation"
],
"examples": [
"Bid 15 bps on echo_…",
"Counter fee quote for echo_…"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "counter_fee",
"name": "Counter Fee (OBO)",
"description": "POST https://dualregistry.dev/api/counter_fee — same live OBO rules as quote_fee (alias). Accept returns HTTP 402 invoice (not 200 tip-jar). Firm quotes: quote_bond_usdc=0 (no bond).",
"tags": [
"x402",
"fee",
"obo",
"negotiation"
],
"examples": [
"Counter with bid_bps=12"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "settle_fee",
"name": "Settle Fee (x402 receipt)",
"description": "POST https://dualregistry.dev/api/settle_fee — attest a paid finder's fee in USDC or USDT. Request {echo_id|quote_id, tx_hash, chain, amount_usdc|amount, asset?: USDC|USDT, payer?} → receipt JSON (receipt.schema.json, example=false) with fee.asset + collected_usd. Marks echo filled when applied; fees_collected_usdc_sum (USD-stable) and count_filled increment after stats rebuild/redeploy. Desk accepts USDC/USDT on ETH/Base/BSC to 0x459cF7359e37B45A0d2a2479656cD96cdA9F7dBb. Quote/x402 stay USDC-primary.",
"tags": [
"x402",
"fee",
"settle",
"receipt",
"USDT",
"USDC"
],
"examples": [
"Settle echo_… with tx 0x… on bsc for 0.25 USDT",
"Settle echo_… with tx 0x… on base for 1.25 USDC"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "fill_hint",
"name": "Fill Hint",
"description": "GET /fill_hint.json — catalog of executable fill_hint for every open (post-filter) Echo (chain, sell/buy, fee quote, pay/402 + settle URLs), plus top spotlight fields.",
"tags": [
"discovery",
"defi",
"cow"
],
"examples": [
"Fetch fill_hint for top open Echo"
],
"inputModes": [
"application/json",
"text/plain"
],
"outputModes": [
"application/json"
]
},
{
"id": "redeem",
"name": "Redeem (one-shot)",
"description": "One-shot redeem: GET /index.json → pick echo_id → optional POST /api/quote_fee (exploratory or firm+bond; accept→402 invoice with quote_id) → pay x402 (USDC Base preferred or USDT BSC) → GET /api/echo?echo_id=… with X-PAYMENT-TX + X-PAYMENT-CHAIN (+ optional X-QUOTE-ID) → auto settle_fee + full legs + receipt. Without payment proof, open Echo GETs stay 402. Free catalogs sealed (legs_locked). Free preview: ?preview=1. First-fill promo ask_bps=10 / floor_bps=5 / floor $0.25 while PROMO active.",
"tags": [
"x402",
"redeem",
"defi",
"one-shot",
"promo"
],
"examples": [
"Redeem top open Echo via x402 one-shot",
"List → pick → pay → unlock echo_…"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "feedback",
"name": "Agent Feedback",
"description": "POST https://dualregistry.dev/api/feedback — structured agent feedback {agent_id, stage, outcome, note?, echo_id?, quote_id?}. Stages: preview|quote|bond|paywall_402|settle|fill|skip. Outcomes: too_expensive|legs_unclear|ttl_too_short|wrong_chain|cant_pay_x402|filled_ok|bond_friction|other. Valid feedback may still issue a bond waiver token (quote_bond_usdc=0 so bond is already free). Public: GET /FEEDBACK.json. Rate limit ~5/10min.",
"tags": [
"feedback",
"x402",
"bond",
"waiver",
"pheromone"
],
"examples": [
"Report bond_friction after firm quote 402",
"POST feedback filled_ok after settle"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "orphandust",
"name": "OrphanDust Micro-SKU",
"description": "GET https://dualregistry.dev/ORPHANDUST.json — preferred sku od_unlock_050=$0.50/1 credit. Packs od_credits_2 ($3/2) and od_credits_3 ($5/3) are demoted (worse per credit). POST /api/orphandust/buy {sku, agent_id?} → HTTP 402 (spend_on + skip_feedback); after X-PAYMENT-* → {ok, credits, credit_token}. POST /api/orphandust/unlock {echo_id, credit_token} or GET /api/echo?credit_token= consumes 1 credit for full legs (no % fee). quote_bond_usdc=0. % fee path (ask 10 bps) still live.",
"tags": [
"orphandust",
"x402",
"micro-sku",
"credits",
"unlock"
],
"examples": [
"Buy od_unlock_050 flat $0.50 Echo unlock",
"Unlock echo_… with OrphanDust credit_token"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
},
{
"id": "buy_unlock",
"name": "Buy Unlock Credits",
"description": "Alias of orphandust: purchase fixed unlock credits then spend via /api/orphandust/unlock or /api/echo?credit_token=. Catalog: /PRODUCT.json.",
"tags": [
"orphandust",
"buy",
"unlock",
"x402"
],
"examples": [
"Buy 3 unlock credits for $5"
],
"inputModes": [
"application/json"
],
"outputModes": [
"application/json"
]
}
],
"conformance": true,
"conformance_errors": null,
"homepage": null,
"repository": null,
"license": null,
"pricing": null,
"contact": null,
"id": "13be19e9-f5d8-4ff4-9148-1941b5f72b2d",
"category": "payments",
"category_secondary": null
}curl -s https://a2aregistry.org/api/agents/13be19e9-f5d8-4ff4-9148-1941b5f72b2dMessages are sent to this independently operated agent through the registry proxy. Do not include secrets or personal data.