steamwebapi

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Live Steam Market API docs, schemas, products, games, markets and endpoint search.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "steamwebapi": {
      "url": "https://mcp.steamwebapi.com/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (11)

• get_integration_skill read-only

  Read the reusable SteamWebAPI SKILL.md for integration workflows, credentials, prices, item variants and CS2 release discovery. Useful when the client does not expose MCP resources or initialization instructions.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• search_endpoints

  Fuzzy text search across all steamwebapi.com OpenAPI endpoints and Steam domain concepts (assetid, doppler phase, market_hash_name, etc.). Returns ranked hits with path, method, tag and summary.

  Parameters:

  • query (required) — string — Free-text query, e.g. "inventory cs2" or "float screenshot".
  • tag — string — Restrict to one OpenAPI tag (Items, Inventory, Profile, Float, Market Prices, Market Index, Account, Info, Explore, Proxy).
  • kind — string — Restrict to endpoints or concepts.
  • limit — integer — Maximum number of hits returned.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_endpoint

  Returns the full OpenAPI operation object for a given path: parameters, request body, all response schemas, examples, and tags. Use after search_endpoints to drill into a specific endpoint.

  Parameters:

  • path (required) — string — Full OpenAPI path, e.g. "/steam/api/items" or "/account/me".
  • method — string — HTTP method. Defaults to "get".

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_endpoints

  Lists all steamwebapi.com endpoints (path + method + summary), optionally filtered by tag. Useful for quickly enumerating what is available.

  Parameters:

  • tag — string — Restrict to one tag. Omit to list every endpoint grouped by tag.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_games

  Lists every game supported by steamwebapi.com with its slug, name, Steam appId, and the value to pass as `game=` in API queries.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_markets

  Lists every third-party marketplace covered by the steamwebapi.com market price endpoints, with their domain and the games they cover.

  Parameters:

  • game — string — Restrict to markets that cover a specific game slug, e.g. "cs2".

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_products

  Lists steamwebapi.com product packages (Price API, Inventory API, Float API, ...) with the endpoints each one bundles. Use get_pricing for paid plans, request quotas and upgrade guidance.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_concept

  Returns a detailed explanation for a Steam / steamwebapi concept (identifiers, CS2 mechanics, pricing fields, inventory flags). Built from curated domain knowledge specific to this platform.

  Parameters:

  • term (required) — string — Concept name or alias, e.g. "assetid", "doppler phase", "market_hash_name", "pricelatest".

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_concepts

  Lists every curated concept exposed by get_concept, optionally filtered by category. Use to discover what domain explanations are available.

  Parameters:

  • category — string — Filter the list by concept category.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_pricing read-only

  Returns public steamwebapi pricing plans, per-endpoint rate limits, API-key location, quota guidance and a recommended plan for the requested use case. Does not perform checkout or account actions.

  Parameters:

  • useCase — string — Optional use case such as "inventory", "profile", "float", "history", "items", "market prices" or "balanced production app".
  • includePlanCatalog — boolean — Include the full public plan catalog with prices and rate limits. Defaults to true.
  • expectedRequestsPerDay — integer — Optional expected daily request count for plan recommendation.

  Hints: read-only yes · destructive no · idempotent not declared · open-world no

• call_readonly_endpoint read-only

  Executes a documented steamwebapi GET endpoint with the caller API key from the MCP Authorization or X-Api-Key header. Refuses POST/PUT/PATCH/DELETE plus Proxy, Steam Guard and Tradeoffer endpoints.

  Parameters:

  • path (required) — string — Documented OpenAPI GET path, e.g. "/steam/api/item" or "/market/{market}/prices".
  • timeoutMs — integer — HTTP timeout in milliseconds. Defaults to 10000.
  • parameters — object — Query and path parameters for the endpoint. Do not include `key`; pass your API key via the MCP Authorization or X-Api-Key header.
  • maxResponseBytes — integer — Maximum response characters returned to the agent. Larger responses are truncated.

  Hints: read-only yes · destructive no · idempotent not declared · open-world yes

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Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.