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Parallel search

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The Parallel plugin provides two Parallel web_search providers:

  • Parallel Search (Free) (parallel-free) — Parallel’s free Search MCP. Requires no account or API key. Select it explicitly when you want Parallel’s hosted key-free search path.
  • Parallel Search (parallel) — Parallel’s paid Search API. Requires a PARALLEL_API_KEY and offers higher rate limits and objective tuning.

Both return ranked, LLM-optimized excerpts from a web index built for AI agents. Set tools.web.search.provider to parallel-free or parallel to choose one explicitly.

Install plugin

Section titled “Install plugin”

Install the official plugin, then restart Gateway:

Terminal window
openclaw plugins install @openclaw/parallel-plugin
openclaw gateway restart

API key (paid provider)

Section titled “API key (paid provider)”

parallel-free requires no API key, but it still must be selected as the managed provider. The paid parallel provider needs an API key:

  1. Create an account

    Sign up at platform.parallel.ai and generate an API key from your dashboard.

  2. Store the key

    Set PARALLEL_API_KEY in the Gateway environment, or configure via:

    Terminal window
    openclaw configure --section web

Config

Section titled “Config”
{
  plugins: {
    entries: {
      parallel: {
        config: {
          webSearch: {
            apiKey: "par-...", // optional if PARALLEL_API_KEY is set
            baseUrl: "https://api.parallel.ai", // optional; OpenClaw appends /v1/search
          },
        },
      },
    },
  },
  tools: {
    web: {
      search: {
        // Use "parallel-free" for the free Search MCP, or "parallel" for
        // the paid API-backed provider shown here.
        provider: "parallel",
      },
    },
  },
}

Environment alternative: set PARALLEL_API_KEY in the Gateway environment. For a gateway install, put it in ~/.openclaw/.env.

Base URL override

Section titled “Base URL override”

The base URL override applies to the paid parallel provider only. The free parallel-free provider always uses https://search.parallel.ai/mcp.

Set plugins.entries.parallel.config.webSearch.baseUrl when Parallel requests should go through a compatible proxy or alternate Parallel endpoint (for example, the Cloudflare AI Gateway). OpenClaw normalizes bare hosts by prepending https:// and appends /v1/search unless the path already ends there. The resolved endpoint is included in the search cache key, so results from different Parallel endpoints are not shared.

Tool parameters

Section titled “Tool parameters”

OpenClaw exposes Parallel’s native search shape so the model can fill in both the natural-language goal and a few short keyword queries — the pairing Parallel recommends for best results.

Natural-language description of the underlying question or goal (max 5000 chars). Should be self-contained. Concise keyword search queries, 3-6 words each (1-5 entries, max 200 chars each). Provide 2-3 diverse queries for best results. Results to return (1-40). Optional Parallel session id (max 1000 chars on `parallel`; the free `parallel-free` Search MCP caps it at 100). Pass the `sessionId` from a previous Parallel result on follow-up searches that are part of the same task so Parallel can group related calls and improve subsequent results. An id past the limit is dropped and a fresh one is generated. Optional identifier of the model making the call (e.g. `claude-opus-4-7`, `gpt-5.5`). Lets Parallel tailor default settings for your model's capabilities. Pass the exact active model slug; do not shorten to a family alias.

Notes

Section titled “Notes”
  • Parallel ranks and compresses results based on LLM reasoning utility, not human click-through; expect dense excerpts in each result rather than full-page content
  • Result excerpts come back as the excerpts array and are also joined into the description field for compatibility with the generic web_search contract
  • Parallel returns a session_id on every response; OpenClaw surfaces it as sessionId in the tool payload so callers can group follow-up searches
  • searchId, warnings, and usage from Parallel are passed through when present
  • OpenClaw always forwards a resolved result count to Parallel as advanced_settings.max_results. The caller’s count arg wins, then the top-level tools.web.search.maxResults setting, otherwise OpenClaw’s generic web_search default (5). This keeps result volume consistent when switching between providers; Parallel on its own defaults to 10
  • Results are cached for 15 minutes by default (configurable via cacheTtlMinutes)
  • The free parallel-free provider accepts the same parameters. It applies count client-side and generates a session_id per call when one is not supplied.
Section titled “Related”