treg.to / Use cases / Advertising intelligence

2 providers · from $0.002 per result · $0.000 markup

Competitor PPC keywords: the Google Ads keywords a domain bids on, with CPC, from SpyFu or Semrush

Give your agent a competitor's domain and get the Google Ads keywords it bids on back as rows: keyword, search volume, cost per click, estimated monthly spend and who else bids on it. SpyFu and Semrush answer through one treg.to key, from $0.002 at the provider's own rate with no markup, priced per row rather than per seat. Both are estimates built from a crawl of the ads they saw, not Google's own numbers, and the page says so before the comparison does.

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$1.00 of free credit on every new team · no provider signup · no card

0 of 2 endpoints on this page are live-verified against the provider.

compared on this page

Try it

What’s the best way to ask ChatGPT?

1Set your agent up, once

in your agent's chat

set up treg — https://treg.to/llms.txt

2Ask for the job

the prompt

Using treg, get the top 200 Google Ads keywords that competitor.com bids on in the US, show me the price first, then drop their brand terms and give me the twenty highest-volume keywords we are not bidding on, with CPC.

works in

Why this prompt works

Give a domain, and a country

The call takes the advertiser's domain and a country code. A brand that advertises in five markets has five different keyword lists.

Cap the rows

SpyFu's page size defaults to 5 and goes to 10,000, and every row is billed. Two hundred rows is a strategy; ten thousand is a bill.

Strip their brand

Every advertiser bids on its own name. Ask the agent to drop those rows before it ranks the rest, or the top of the list is noise.

Ask for the price first

treg.to returns the rate before the call, so the agent can say what a full pull across ten competitors will spend.

Why treg.to

Why go through treg.to

One key, not 9 accounts

treg.to holds the provider keys. Neither you nor the agent sees them.

Price before the call

The provider's own rate, $0.000 markup, from a prepaid balance.

No subscription, no seats

Charged per call. $1.00 free per new team, no card to start.

Your own keys are free

Already pay Hunter? Register it and those calls are never metered.

Switch by changing a word

Another provider is a different word in the prompt, not a new integration.

Nothing to integrate

No SDK, no OAuth dance per vendor, no seats.

Behind the scenes

What ChatGPT sees before it calls

treg.to does not choose for you. It hands ChatGPT this comparison, with the price shown before any call, and ChatGPT picks. Or you tell it how: "cheapest", "most reliable", "the one that takes what I have", or a provider by name.

Which competitor PPC keywords API is cheapest per row?

Cheapest per result

SpyFu at $0.002

Which one is the most reliable?

Provider	Success	Median	Sample
SpyFu	100%	207ms	53 calls

Measured on treg.to traffic: real calls, real inputs, and sample sizes differ by provider. Live reliability, not a controlled benchmark.

How do SpyFu and Semrush compare?

Provider	Price	Accepts	Success rate	Verified
SpyFu	$0.002 per result	query, pageSize, startingRow, sortBy, sortOrder, countryCode	100% (53 calls)	unverified
Semrush	no dollar rate published	type, domain, database, display_limit, display_offset, display_sort	not yet measured	unverified

Run one

the cheapest verified call

treg call spyfu.google.domain.paid_keywords

Swap the id for any provider above. All 2 endpoints behind this job, with their parameters and captured responses, are on the Google Keyword Data shelf.

How these numbers are made

PricesEach provider’s own published rate, converted to US dollars for one chargeable event of the unit they bill in. treg.to adds $0.000. Where a provider bills in credits, the conversion uses the rate on their public pricing page.

Success ratetreg.to’s own served calls over the last 30 days: 2xx counts as a success, 5xx and timeouts as a failure. A 4xx is excluded, because it usually means the caller sent bad parameters and one bad query should not make a healthy endpoint look broken.

What this is notA controlled benchmark. These are real calls with real inputs, so sample sizes and the difficulty of what was asked differ by provider. Treat the rates as live reliability, not a like-for-like test.

VerifiedThe date treg.to last called the endpoint end to end and confirmed the shape of its response and the price it charged.

From the field

What people actually struggle with

PPC tool threads are heavily seeded: of the ~95 distinct Reddit and X posts read in August 2026, one vendor's cluster ran to seven posts across three subreddits and two listicles were posted twice each. These five are advertisers and SEOs asking on their own behalf.

Google's own report does not answer the question

“Auction Insights only provides a campaign summary, which lacks detail.” r/PPC

What this page can do about it: It names the overlapping advertisers and stops. The per-domain rows here are the detail it lacks: which keywords, at what estimated CPC, against how many other bidders, one call per competitor.

The estimate missed the other bidders

“I tried Spyfu, and it was a little inaccurate. It showed me that only my brand was bidding on a specific keyword” r/PPC

What this page can do about it: A crawl only records the ads it saw, and small or local advertisers fall through. No table fixes that. Pull the same keyword from both providers and treat a bidder both report as real; treat one nobody reports as unknown, not absent.

Do you have to buy both tools?

“Given Spyfu is only $9/month, do you think there is a case to be made to just purchase both?” r/PPC, 35 points

What this page can do about it: Through treg.to nobody buys either seat. SpyFu is metered per row on treg.to's key; Semrush runs on a plan you already hold. Calling both for one domain costs rows, not subscriptions.

The two tools do not agree with each other

“one site I put into SEMrush shows 12.6k in traffic while Spyfu shows 3.2k” r/bigseo, 8 points

What this page can do about it: Different crawls, different models, different numbers, and neither is Google's. The page shows the two side by side and leaves the choice to you; it does not average them or pick a winner.

The subscriptions are priced for agencies, not for one question

“I wanted to do some keyword research yesterday and was surprised by how expensive Ahrefs / Semrush were.” r/TechSEO, 40 points

What this page can do about it: One competitor's keyword list is a per-row call, a fraction of a cent for the first page, with the rate printed before the agent spends it. The seat-priced tools stay on their own sites, linked, not restated.

The detail

What actually differs

SpyFu bills per row and defaults to five.

At $2.00 per 1,000 rows, a first look at a domain is a fraction of a cent and a ten-thousand-row dump is $20, so the page size is the cost dial. Rows carry the keyword, search volume, ranking difficulty, monthly clicks, broad and exact CPC, estimated monthly cost and the count of competing advertisers, and the endpoint has answered every call treg.to has measured so far.

Semrush prices in API units bought up front, 20 per line on the current view and 100 per line for a past date, and publishes no dollar rate for a unit, so the page prints no price for it.

Its rows add the position and the live ad copy, which SpyFu does not carry. Send a display limit: the default is 10,000 lines, and an agent that loops without one spends real units. It has not been called live through treg.to yet.

Both are crawl estimates, and the research is full of the consequences: a local advertiser missing entirely, a tool showing one bidder on a keyword that had several, two tools disagreeing on a domain's traffic by a factor of four.

No comparison table settles which is right for your niche. The cheap test is to pull the same domain from both and treat the overlap as the confident set.

Background

How do you find the keywords a competitor bids on?

Google will not tell you. Auction Insights shows which advertisers overlapped with your campaign, not which keywords they bought, and Keyword Planner's competition index counts your own ads. The third-party answer is a crawl: SpyFu and Semrush sample Google results, record which domains' ads appear against which queries, and estimate volume, CPC and spend from there. That is what a competitor PPC keywords API returns, one domain at a time, and why two tools will not agree with each other or with the advertiser's own account.

Questions

Before you start

Is this Google's own data?

No. Google publishes no per-keyword view of another advertiser's account. SpyFu and Semrush estimate it from the ads their crawls observed, which is why the monthly cost column is an estimate and a competitor's max bid is not on the page at all.

Do I need a SpyFu or Semrush subscription?

Not for SpyFu: treg.to serves it on its own key, metered per row from your team's balance at SpyFu's rate with $0.000 added. Semrush's API units come with a Semrush plan, so that row runs on your own Semrush key, never metered by treg.to.

Can I see a competitor's budget or impression share?

No. The rows carry an estimated monthly spend per keyword, built from volume, CPC and observed position. Impression share, bids and search terms Google does not disclose are not in any third-party tool, and this page will not imply they are.

Which provider should my agent use?

SpyFu for a priced, verified per-row pull; Semrush when you hold a plan and want the ad copy. treg.to shows both side by side with the rate and the measured success; it compares, it does not route or fail over for you.