CaptchaSonic is worth paying for when you need breadth or a route for AI agents, and not when you need cheap reCAPTCHA tokens. It prices 27 challenge types and ships an MCP server and SDKs in four package registries. Its reCAPTCHA v2 token costs $2.99 per 1,000, level with the dearest rate among seven solvers we read on 11 October 2026.
One fact comes first: since 11 October 2026, CaptchaSonic and HProxy list each other on their partners pages. We wrote this review the way we write every other one. It rests on the vendor's own pages, the package registries and the browser stores, all read on that day, and the partnership changed nothing in it.
We did not buy credit or run a solve. Where a number is the vendor's own and cannot be checked from outside, we say so.
What CaptchaSonic sells
CaptchaSonic sells successful solves, priced per 1,000 in US dollars. Its price list had 27 priced rows on 11 October 2026. Fifteen more were marked as coming soon, among them DataDome, Akamai and Kasada.
The big challenges come in two modes. A token is the finished answer your form submits. Image mode only labels the pictures, and your own browser does the clicking. For reCAPTCHA v2 the token costs $2.99 and image mode $1.00.
What CaptchaSonic charges per 1,000 solves
| Challenge | Token | Image mode | Stated ceiling |
|---|---|---|---|
| reCAPTCHA v2 | $2.99 | $1.00 | 12 s |
| reCAPTCHA v2 Invisible | $2.99 | $1.00 | 8 s |
| reCAPTCHA v3 | $1.45 | not listed | 3 s |
| reCAPTCHA Enterprise | $2.99 | $1.00 | 8 s |
| hCaptcha | by contact | $0.20 | 10 s |
| Cloudflare Turnstile | $1.45 | not listed | 13 s |
| MTCaptcha, CyberSiARA, Friendly Captcha, Prosopo, CaptchaFox | $1.45 | not listed | 6 to 11 s |
| AWS WAF, Lemin | not listed | $1.45 | 8 to 21 s |
| GeeTest, Capy, KeyCAPTCHA, TikTok | not listed | $2.99 | 10 to 14 s |
| Text, math, audio and plain image tasks | not listed | $0.50 | 3 to 6 s |
Puzzle types such as GeeTest, Capy and TikTok cost $2.99 per 1,000, in image mode only. Most token types cost $1.45. Text, math and audio tasks cost $0.50, and the image mode of hCaptcha costs $0.20.
How the prices compare with six other solvers
A price means little on its own, so we read six other solvers' pages on the same day. reCAPTCHA v2 is the fair yardstick, because every one of them prices it. Cloudflare Turnstile is the second column.
Token prices per 1,000 at seven solvers
| Solver | reCAPTCHA v2 | Turnstile |
|---|---|---|
| NextCaptcha | $0.50 | $0.60 |
| CapMonster Cloud | $0.60 | $1.30 |
| CapSolver | $0.80 | $1.20 |
| Anti-Captcha | $0.95 to $2 | $2 |
| 2Captcha | $1 to $2.99 | $1.45 |
| DeathByCaptcha | $2.89 | $2.89 |
| CaptchaSonic | $2.99 | $1.45 |
On reCAPTCHA v2 tokens, CaptchaSonic is the dearest of the seven, level with the top of the 2Captcha band. 10,000 tokens cost $29.90 there. That is nearly six times the $5.00 they cost at NextCaptcha, and five times the $6.00 at CapMonster Cloud.
Turnstile tells a different story: at $1.45, CaptchaSonic matches 2Captcha and undercuts Anti-Captcha and DeathByCaptcha. It trails NextCaptcha, CapSolver and CapMonster Cloud. On MTCaptcha it is cheap: $1.45 against $3.00 at CapSolver.
Read rival prices on the rivals' own pages
CaptchaSonic's pricing page carries its own table of four rivals. On 11 October 2026, six of its eight rival prices did not match what those rivals posted the same day, and the gaps ran both ways. It showed the CapMonster Cloud reCAPTCHA v2 rate as $1.00 against a posted $0.60, and the Anti-Captcha Turnstile rate as $1.50 against a posted $2. The table says it is refreshed quarterly. The table above is read from each vendor's own page.
Is it fast enough for a token to stay valid?
Yes, by its own numbers. Google states that a reCAPTCHA token is valid for two minutes and can be checked once. Cloudflare gives a Turnstile token 300 seconds, also for one use.
CaptchaSonic states ceilings of 12 seconds for reCAPTCHA v2 and 13 for Turnstile. A solve at the ceiling uses a tenth of the reCAPTCHA window and about a twenty-third of the Turnstile one. That leaves room for a retry, a proxy handshake and a page load before the token goes stale.
The same page claims an average reCAPTCHA v2 solve under 3 seconds. That is the vendor's own figure, and we did not measure it.
Using it from an AI agent or your own code
This is where CaptchaSonic puts its effort. Its homepage leads with the MCP server and a Claude Code plugin. Most of its 15 public GitHub projects were created in June 2026, and its first MCP package went up on npm on 30 May 2026.
The MCP server runs in two ways. An MCP client can point at a hosted address, mcp.captchasonic.com, with your API key as a bearer token. Or you run it yourself with npx @captchasonic/mcp-server, which needs Node.js 20.3 or later.
Version 2.0.0, published on 6 October 2026, gives the agent five tools. Two of them solve: one takes a page address and site key for token challenges, the other takes images. The rest fetch a pending result, read your balance, and list every supported type with its price.
The docs page for agents still describes the three tools of the first version. When the two differ, trust the code page.
Claude Code also gets a plugin. Two commands install it, /plugin marketplace add captchasonic/captchasonic-skill and then /plugin install captchasonic. It brings three skills: one for setup, one for solving and one for the balance.
An MCP server is no longer rare among solvers. 2Captcha has published one since April 2026, CapSolver since June and CapMonster Cloud since July, each under its own GitHub account. The CaptchaSonic server can also run hosted, so an agent needs nothing installed locally.
Without an agent, the API is plain HTTP. You send a task to createTask with your key, then ask getTaskResult for the answer. The field names match the documented CapSolver API, down to the Turnstile task name, AntiTurnstileTaskProxyLess. If your code already talks to CapSolver, compare the two task lists before you move it.
CaptchaSonic code packages, as the registries list them
| Package | Where | Version | Released | Downloads |
|---|---|---|---|---|
| MCP server | npm | 2.0.0 | 6 Oct 2026 | 138 a month |
| Node.js SDK | npm | 2.2.0 | May 2026 | 430 a month |
| Python SDK | PyPI | 1.1.0 | 28 May 2026 | not shown |
| Go SDK | Go modules | 1.0.0 | 5 Jun 2026 | not shown |
| C# SDK | NuGet | 1.0.1 | 28 May 2026 | 274 in total |
| Java SDK | GitHub only | none | none | none |
| PHP SDK | not found | none | none | none |
The vendor's own comparison table claims SDKs in six languages, PHP among them. Four are on a public registry. Java exists as source code on GitHub, and we found no PHP package at all.
The browser extension
The extension is the oldest part of the business. The domain was registered on 6 December 2024, the GitHub account three days later, and the Firefox add-on a week after that. It has shipped five releases since April 2026, the latest on 9 October.
It works in Chrome and Firefox and solves on the page once you enter your API key. Without an active account and key it does nothing, which is the complaint in a Firefox review from January 2026.
The two stores do not agree with the site. Chrome shows 10,000 users and 4.4 stars from 101 ratings. Firefox shows 289 daily users and 2.3 stars from 3 ratings. The CaptchaSonic banner says 20,000-plus users and 4.7 stars.
The user count may include API customers who never installed the extension. The 4.7 appears in neither store. Eight of the ten newest English reviews on the Chrome page are dated 4 October 2026, so we give that average little weight either way.
Which claims hold up
We sorted the headline claims by what an outsider can check.
CaptchaSonic claims, checked on 11 October 2026
| Claim | What we found | Verdict |
|---|---|---|
| 99.9% uptime | The status page shows the solving API at 99.94% | Holds |
| 4.7 stars, 20,000+ users | Chrome shows 4.4 stars and 10,000 users | Does not match the store |
| SDKs in six languages | Four on public registries, Java on GitHub only, no PHP | Partly |
| Rival prices in its table | Six of eight differ from the rivals' own pages | Out of date |
| 99.9% success, under 3 s on average | No data published to check it | Cannot check |
| AI solving, no human relay | Nothing public to check it | Cannot check |
| A logo wall of AI labs as customers | Logos only, nothing to check them against | Cannot check |
| A live count of solves in the last hour | 1,934,336 when we read it | Cannot check |
The one claim we could test from outside held. The public status page put the solving API at 99.94 percent. One of its four monitors, the dashboard API, read zero, and the page header listed one of four systems as not working.
The rest are the vendor's word, which does not make them false. It means you should test the claims that matter to you, on your own targets, with the free credit.
The pricing page also contradicts itself once. Its FAQ calls hCaptcha image tasks the most expensive type, while the table above it prices them at $0.20. Go by the table.
Refunds, trial and who you are paying
New accounts get starter credit without a card. Failed solves are refunded automatically, so you pay only for answers that work, according to the pricing FAQ. Credit starts at $1, according to the plugin's own page.
Refunds of unused credit are narrower. The refund policy, last updated on 1 January 2026, considers them within 30 days of purchase and subject to approval. Promotional credit and credit older than 30 days are not refundable.
The footer names the seller as CaptchaSonic Inc., but no page we read gives an address or a country. The Chrome listing marks the developer as a non-trader. For buyers in the European Union, the store adds, consumer rights then do not apply to contracts with it.
Who should buy it
Buy CaptchaSonic if you build AI agents and want a solver they can call through MCP, hosted or local. It also makes sense for the rarer types: TikTok, KeyCAPTCHA, Capy, Lemin, CaptchaFox, Prosopo or MTCaptcha. Its prices for those are posted, and on MTCaptcha they are low.
Look elsewhere if most of your volume is reCAPTCHA v2 tokens. All six other solvers we read post a lower rate there, at least at the low end of their bands.
Either way, start with the free credit and run it on your own targets. That is the only test that settles speed and success for your job.
Why the proxy decides how many captchas you meet
A solver clears a challenge after it appears. It does nothing about how often challenges appear, and that rate is set by the address your request comes from. Google's help page says its unusual traffic message appears when a network seems to be sending automated traffic.
That rate is measured. In ProxyVero's test of 7 September 2026, our residential pool reached 60 percent success on Google search, with a third of requests blocked. Across the 50 residential providers in its August 2026 report, the average was 44.49 percent success and a 54.22 percent block rate. The full breakdown is here.
Each challenge a job meets is one more solve on the bill, because solvers charge per solve. Halve the challenge rate and you halve the solver bill.
Residential traffic at HProxy costs $0.50/GB for the first gigabyte, with no plan and no minimum order, and the balance never expires. Pair it with a solver for the challenges that still appear. For every solver side by side, see captcha solving services compared.
Sources
- CaptchaSonic, price list, FAQ and comparison table, read 11 October 2026.
- CaptchaSonic, homepage, AI agents documentation, refund policy and terms of service, read 11 October 2026.
- CaptchaSonic, MCP server and Agent-skills projects and extension issues on GitHub, read 11 October 2026.
- CaptchaSonic, public status page, read 11 October 2026.
- npm, PyPI, Go module proxy, NuGet, Maven Central and Packagist records for CaptchaSonic packages, read 11 October 2026.
- Chrome Web Store and Firefox Add-ons listings for the CaptchaSonic extension, read 11 October 2026.
- Verisign, RDAP record for captchasonic.com, read 11 October 2026.
- Pricing pages of 2Captcha, CapSolver, Anti-Captcha, CapMonster Cloud, DeathByCaptcha and NextCaptcha, read 11 October 2026.
- CapSolver, Cloudflare Turnstile task documentation, read 11 October 2026.
- GitHub projects of the 2Captcha, CapSolver and CapMonster Cloud MCP servers, read 11 October 2026.
- Google for Developers, "Verifying the user's response", reCAPTCHA documentation, last updated 14 October 2024.
- Cloudflare, "Server-side validation", Turnstile documentation, last updated 16 September 2026.
- Google Search Help, "Resolve Google Search's 'Unusual traffic from your computer network' message", read 11 October 2026.
- ProxyVero, HProxy benchmark of 7 September 2026, and the August 2026 report dataset.
