Perplexity has released pplx, an official command line client for its Search API. The tool returns grounded search results and extracted page text, all as JSON. According to its docs, it targets humans and coding agents equally. It is not a chat client. There is no conversational mode, no model selection and no synthesized answer.

Two surfaces, one output contract

The tool exposes exactly two working surfaces. pplx search web runs a live web search. pplx content fetch pulls a URL and returns cleaned page text.

The contract around them is the interesting part. Per the official pplx-cli Agent Skill, success means exit code 0 and exactly one JSON object on stdout. Search returns sh</span>\n\n<span class="k">>></span> Resolving latest release\n<span class="k">>></span> Downloading pplx-aarch64-apple-darwin.bin (2026.07.23.1784814721+8fdc4c2)\n<span class="k">>></span> Verifying checksum\n<span class="g">>></span> <span class="g">Installed 2026.07.23.1784814721+8fdc4c2 to ~/.local/bin/pplx</span>\n\n<span class="c"># no sudo. override the target with PPLX_INSTALL_PATH</span>', note:'The installer reads <b>manifest.json</b> from the latest release, then pins every remaining download to that release tag. It verifies the binary against <b>SHA256SUMS</b> before installing, and writes a receipt to <b>~/.config/pplx/pplx-receipt.json</b> only after the binary runs. Unsupported platforms are rejected outright — there is no Windows or Intel macOS build.'.

Every failure exits 1 with an empty stdout. One JSON error object goes to stderr, shaped t:"Install",h:"Install the binary", why:'One command. The installer resolves the latest release, verifies the SHA-256 checksum, and drops a single binary into <b>~/.local/bin/pplx</b>. Set <b>PPLX_INSTALL_PATH</b> to install elsewhere.', code:'<span class="p">$</span> curl -fsSL https://github.com/perplexityai/perplexity-cli/\\\n releases/latest/download/install.sh . Documented codes include AUTHENTICATION, UNKNOWN_ARGUMENT, ARGUMENT_ERROR and BAD_REQUEST. The skill notes that list is not exhaustive, so callers should branch on error.code.

Install path and platform support

Installation is a single shell command that pipes a script into sh:

curl -fsSL https://github.com/perplexityai/perplexity-cli/releases/latest/download/install.sh | sh

Reading install.sh shows what it actually does. It downloads manifest.json from the latest release and extracts the tag and version. It then pins every remaining download to that tag, explicitly to avoid racing a concurrent publish.

It fetches SHA256SUMS and the platform binary, verifies the checksum, and installs to ~/.local/bin/pplx. No sudo is required. A receipt is written to ~/.config/pplx/pplx-receipt.json, but only after the installed binary runs successfully.

Platform coverage is limited to three targets: macOS on Apple Silicon, Linux x86_64 and Linux arm64. Anything else exits with an error. There is no Windows build and no Intel macOS build.

Context-window economics are a first-class design concern

The most agent-specific feature is token budgeting. --output-dir writes the full result set to a JSON file. --stdout-preview[=] truncates long string fields in stdout, adding ... markers.

The skill is blunt about the trap: --stdout-preview is a no-op without a save directory. It truncates only when the result is also saved via --output-dir or $PPLX_OUTPUT_DIR. Used alone it returns full-size output, and hits can be multiple KB each.

Saved search results land at {dir}/web/{rand}.json and fetches at {dir}/fetch/{rand}.json. Files are written only after a successful request. PPLX_OUTPUT_DIR sets a workspace default so the flag need not be repeated.

For content fetch, the skill adds a correctness check rather than a cost one. Verify error and is_paywall in the output before trusting content. --html adds a raw_html field fetched live via crawler, and --no-cache forces a live fetch.

Key Takeaways

• pplx is a single verified binary exposing two commands: pplx search web and pplx content fetch.
• Success is exit 0 plus one JSON object on stdout; failures put one JSON error object on stderr.
• pplx auth login is TTY-only, so agents and CI must export PERPLEXITY_API_KEY.
• --stdout-preview only truncates when paired with --output-dir or $PPLX_OUTPUT_DIR.
• Search API billing is $5.00 per 1,000 requests, capped at 50 QPS on every usage tier.

Sources: perplexityai/perplexity-cli, pplx-cli SKILL.md, api-platform-developers, Perplexity API pricing, Rate limits and usage tiers, and Search API quickstart