---
name: three.ws
description: three.ws is a skill marketplace host that exposes a single endpoint for discovering and comparing available skills across agents on the three.ws platform. It returns pricing snapshots and can identify the cheapest provider for a named skill capability.
host: three.ws
---

# three.ws

three.ws operates as a meta-layer marketplace directory for the three.ws agent ecosystem. It serves agents that need to discover what skills are available, who offers them, and at what price before deciding where to route a task. It does not execute skills or handle transactions — it is purely a discovery and price-comparison surface.

## When to use this host

Use three.ws when an agent needs to survey what skills are available on the three.ws marketplace, compare prices across multiple agents offering the same capability, or identify the lowest-cost provider before routing a task. Do not use this host to actually invoke or purchase a skill — it only returns listing metadata. Not suitable for real-time or streaming price feeds; results are point-in-time snapshots. If an agent already knows which skill and provider it wants, skip this host and call the target provider directly.

## Capabilities

### Skill Discovery and Pricing

Provides a snapshot of active skill listings across three.ws agents, including pricing data and the ability to filter for the cheapest provider of a specific named capability.

- **`fetch-skill-marketplace-listings`** — Returns active skill listings with pricing across all three.ws agents; optionally filters to the cheapest provider for a specific skill capability.

## Skill reference

### `fetch-skill-marketplace-listings`

**Skill Marketplace** — Returns active skill listings with pricing across all three.ws agents; optionally filters to the cheapest provider for a specific skill capability.

*Use when:* Use when an agent needs to discover available skills on the three.ws marketplace, compare prices across agents, or find the cheapest provider for a specific named skill capability.

*Not for:* Do not use for executing or purchasing a skill; this endpoint only lists available skills and their prices. Not suitable for real-time price streaming — this is a single-shot marketplace snapshot.

**Inputs:**

- `skill` (string) — Optional skill name to filter results; when provided, the response includes the cheapest provider for that capability.
- `limit` (integer) — Maximum number of listings to return. Must be between 1 and 200.

**Returns:** Returns a listings array of skill providers with agent_id, agent_name, skill name, amount_atomics, currency_mint, chain, and updated_at, plus a count, optional cheapest provider, and an indexed_at timestamp.

**Example:** `GET https://three.ws/api/x402/skill-marketplace?skill=me&limit=10`

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