Imported from webshare-proxy/skills (skills/proxy-optimizer/SKILL.md). Install upstream with npx skills add webshare-proxy/skills --skill proxy-optimizer. Copyright stays with the author (MIT).

Target Site Proxy Optimizer

Optimize a Webshare proxy pool for a specific target website by testing, analyzing, and replacing blocked proxies.

Invocation

/proxy-optimizer https://www.example.com

The argument is the target URL to optimize proxies for.

What this skill does / needs / will not do

Does: probes every proxy against the target, ranks failures by country/ASN/subnet, and drives a confirmed, dry-run-first replacement of the blocked IPs.

Needs:

1. The webshare CLI (brew install webshare-proxy/tap/webshare) with WEBSHARE_API_KEY exported — the script pulls plans and proxies through it. Verify with webshare whoami.
2. Python 3.10+.
3. For the replacement step only: the Webshare MCP server connected (claude mcp add --transport http webshare https://mcp.webshare.io/ -H "Authorization: Token $WEBSHARE_API_KEY") and an active paid plan with replacement credits. Targeted per-IP replacement is not in the CLI yet, so the MCP's create_proxy_replacement is used for exactly this step.

Will not do:

• Replace proxies without a dry run and your explicit confirmation.
• Whole-pool refreshes — that is webshare proxies refresh territory (see the proxy-manager skill) and consumes an on-demand refresh.
• Test residential rotating pools per-IP (they have no fixed per-proxy address).

Workflow

Step 1: Check proxy count and ask about sampling

Find the plan and its size:

webshare plans list --json

If the plan has more than 50 proxies, ask the user:

"Your plan has N proxies. Test all of them or a sample?"

Options:

• All N proxies (takes longer)
• Sample of 20 (quick check)
• Sample of 50

If 50 or fewer, skip this question and test all.

Step 2: Run the optimizer script

Run the script from this skill's directory:

python3 scripts/optimize_proxies.py --target <TARGET_URL> --workers 10 --timeout 15

If the user chose a sample, add --sample N. To pin a plan, add --plan-id <id>. The script pulls the plan and proxy list via the webshare CLI, outputs progress to stderr and structured JSON to stdout. Parse the JSON output.

Step 3: Report findings

Present the results to the user:

Proxy Optimization Report for <TARGET_URL>

Success rate: X% (N/M proxies working)

Problem areas:
- Countries: <list countries with failure rates>
- ASNs: <list ASNs with failure rates>
- Subnets: <list /24 subnets with failure rates>

Failed proxies: <count>
Replacement credits available: <count>

If success rate is 100%, report that all proxies are working and no action is needed. Stop here.

Step 4: Ask if the user wants details

Ask the user: "Want to see which proxies are failing before we replace them?"

If yes, show a table of every failing proxy with its IP, country, ASN, error, and latency from the raw_results in the JSON output. For example:

| IP              | Country | ASN                  | Error           | Latency |
|-----------------|---------|----------------------|-----------------|---------|
| 82.27.245.138   | ZA      | Xneelo               | 502 Bad Gateway | 396ms   |
| 82.27.246.135   | ZA      | Xneelo               | 502 Bad Gateway | 413ms   |
| 104.143.224.192 | GB      | Getechbrothers, Mb   | HTTP 429        | 808ms   |

Then ask: "Replace these proxies? (dry run first)"

If the user says no or wants to skip some, respect that. Only proceed with the IPs they confirm.

Step 5: Dry-run replacement

If there are failures AND the user has replacement credits, execute a dry-run replacement using the Webshare MCP.

Use the create_proxy_replacement MCP tool with the parameters from the script's recommendations.mcp_actions output:

• plan_id: from the script output
• to_replace: {"type": "ip_address", "ip_addresses": [<failed IPs>]}
• replace_with: [{"type": "any"}]
• dry_run: true

Present the dry-run results:

Dry-run preview:
- Proxies to remove: <count>
- Proxies to add: <count>

Proceed with replacement? (This will use <N> replacement credits)

Step 6: Execute replacement (requires user confirmation)

CRITICAL: Always ask the user for explicit confirmation before executing.

If the user confirms, call create_proxy_replacement again with dry_run: false.

Then poll get_proxy_replacement with the returned id until state is completed or failed.

Step 7: Verify

Re-run the optimizer script against the same target to confirm the replacement improved the success rate.

Report the before/after comparison:

Before: X% success rate (N failures)
After:  Y% success rate (M failures)

Important Rules

1. Never skip the dry run. Always preview before executing.
2. Never replace without user confirmation. Replacements consume credits and are irreversible.
3. If replacement credits are 0, report the findings but explain that replacements require credits (available on paid plans).
4. If all proxies pass, say so and stop. Don't suggest unnecessary replacements.
5. Limit replacements to available credits. If 20 proxies failed but only 10 credits are available, prioritize replacing proxies in the worst-performing ASNs/subnets first.

Troubleshooting

• webshare CLI not found: brew install webshare-proxy/tap/webshare or download from https://github.com/webshare-proxy/webshare-cli/releases
• WEBSHARE_API_KEY not set: export WEBSHARE_API_KEY="..." — generate one at https://dashboard.webshare.io/userapi/keys
• No active plan found: User needs an active Webshare subscription
• 0 replacement credits: Available on paid plans only; user may need to upgrade
• All proxies timeout: Target site may be completely blocking datacenter IPs; suggest trying residential proxies instead
• Replacement step fails: Check the Webshare MCP is connected (claude mcp list); the CLI alone cannot execute targeted replacements