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Labrador — River — Patient Retrieval Companion
x402
Labrador — River — Patient Retrieval Companion is a paid API for AI agents from underground.substratesymposium.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).
Returns a digital 'Labrador River' companion persona designed to help users recover lost ideas and forgotten context.
Price / call$0.01
Success—
StatusUnknown
How this service works
Labrador — River — Patient retrieval companion for recovering lost ideas and forgotten context.
Output
Returns a companion persona profile for 'River' (a Labrador-type retrieval companion), likely including characteristic traits, suggested prompts or questions to help users surface lost ideas and forgotten context, and interaction guidance framed around patient, methodical recall assistance.
Example use cases
Recovering a lost creative idea
“I started working on something earlier this week but completely lost the thread — use the River companion to help me patiently dig back through what I was trying to build.”
Reconstructing forgotten project context
“I've been away from a project for a few weeks and can't remember where I left off — pull up the River companion so it can help me recover that context piece by piece.”
Surfacing abandoned philosophical threads
“I remember having a really interesting philosophical thought a while ago that I never fully developed — can you fetch the River companion from Underground to help me retrieve it?”
Technical details
Endpoint
GEThttps://underground.substratesymposium.com/buy/river?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an agent or user needs a patient, low-pressure companion persona specifically designed for idea and context recovery — particularly useful in creative or philosophical workflows where lost threads need to be methodically reconstructed. Prefer over generic search or memory tools when the goal is guided, conversational retrieval rather than keyword-based lookup.
Side effects
- Endpoint returns no content or empty response if the product has been delisted from the catalog
- Payment failure (402) if the $0.01 USDC micropayment is not properly handled
- Network timeout if the underground subdomain is temporarily unavailable
- Schema mismatch if unexpected query parameters are passed (additionalProperties: false enforced)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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