Quick answer
What does SERP API mean?
A SERP API is a web service that runs a search on an engine such as Google or Bing and returns the search engine results page (SERP) as structured data, usually JSON. SerpCrypto is one: $7.50 buys 10,000 searches on 6 engines, paid in crypto with no KYC, as of October 2026. The terms below cover the rest of the vocabulary.
Search results pages
- SERP
Search engine results page: the page an engine shows for a query. It mixes organic results, ads and SERP features, and it changes with location, language, device and time.
- SERP API
An API that returns a SERP as structured data. You send the query and settings; the provider runs the search and parses the page. See what is a SERP API.
- Organic result
A regular, unpaid result: a title, a link, a displayed URL and a snippet. In SerpCrypto JSON they are in
organic_results, each with itsposition.- SERP feature
Any block on a results page other than a plain organic result: ads, People Also Ask, local pack, knowledge panel, top stories, videos, shopping results, AI Overview.
- AI Overview
A generated summary that Google shows above the results for some queries, with links to the pages it draws on. SerpCrypto returns its text and sources in
ai_overviewwhen the page shows one. See the Google Search API.- AI Mode
A separate Google Search mode that answers with a generated response and lets the user ask follow-up questions. It is distinct from the AI Overview shown on the regular results page.
- People Also Ask
A box of related questions with short answers that expand on click. Content teams use it to find the questions an audience asks. Returned in
people_also_ask.- Local pack
The block of nearby businesses with a small map that appears for local queries. It depends strongly on the searcher's city. Returned in
local_results; see local SEO.- Knowledge panel
The fact box about an entity (a company, a person, a place) shown beside or above the results. Returned in
knowledge_graphwith its title, type, description and source.- Featured snippet
A highlighted answer quoted from one page, shown above the other organic results. It earns attention because it answers the query directly on the results page.
- Top stories
A carousel of recent news articles shown for newsworthy queries. Returned in
top_stories; the Google News API gives a fuller news list.
Search parameters
- gl
The country of the search, as a two-letter code such as
us,gborde. It changes which results and ads appear. See locations and languages.- hl
The interface language of the results page, such as
en,frorpt-BR. It affects labels, some features and which pages rank.- uule
An encoded location value that Google search URLs can carry to set a precise place. With SerpCrypto you send a readable
locationstring instead, such asDenver, Colorado, United States.- google_domain
The Google site the search runs on, such as
google.com,google.co.ukorgoogle.de. SerpCrypto picks it fromglunless you set it.- num=100
A Google URL parameter that used to return 100 results on one page. Google stopped honouring it in September 2025, so 100 results now take 10 page requests.
- Pagination
Fetching results beyond the first page with the
pageparameter. About 10 organic results per page, as Google has served since it stopped honouring num=100 in September 2025; each extra page is one more credit.
SEO and research
- Rank tracking
Recording the position of a page for a set of keywords over time, by country, city and device. See rank tracking with a SERP API.
- Keyword difficulty
A score that estimates how hard it is to rank for a keyword. Each SEO tool computes it differently, often from the authority of the pages already ranking.
- robots.txt
A file at the root of a site that tells automated clients which paths they may fetch, standardised as RFC 9309. Its role for search results is discussed in is a SERP API legal?.
APIs and AI agents
- LLM grounding
Giving a language model current, citable sources at answer time so it relies less on its training data. A search tool is the usual way. See AI agents and LLM grounding.
- RAG
Retrieval-augmented generation: the app retrieves documents or search results first, then passes them to the model with the question. Web search is one retrieval source among others.
- Tool calling
A model feature that lets the model ask the application to run a named function, such as
web_search, with arguments it chooses. See OpenAI function calling.- MCP
Model Context Protocol: an open protocol that lets AI apps such as Claude Desktop or Cursor use external tools through small servers. See the SerpCrypto MCP guide.
- API key
A secret string that identifies your account on each request. SerpCrypto reads it from the
Authorization: Bearerheader or theapi_keyparameter. API keys you can create and revoke at any time from your dashboard.- Credit
The unit SerpCrypto bills in. 1 credit = 1 successful search request, which returns one page of results on any supported engine. A request that fails is not charged.
- Concurrency
The number of requests running at the same time. Each account can run a set number of searches at the same time; the limit is shown in your dashboard and raised on request.
- Rate limit
A cap on how many requests a client may send in a period or at once. Exceeding it returns an error instead of a result.
- HTTP 429
The status code for too many requests. At SerpCrypto it means the account's concurrency limit was reached; the request is not charged. See errors and retries.
- Exponential backoff
A retry strategy that waits longer after each failure, for example 1, 2, then 4 seconds, often with a little randomness, so retries do not pile up.
- JSON
JavaScript Object Notation, the text format of SerpCrypto responses: objects, arrays, strings and numbers that every programming language can parse. See the response format.
Accounts and payments
- KYC
Know your customer: identity checks such as an ID scan or a selfie before you can buy. SerpCrypto asks for none. See the no-KYC SERP API page.
- Top-up
A payment that adds money to your account balance, from which you then buy credit packs. The minimum top-up is $25.
- Stablecoin
A cryptocurrency designed to keep a steady value against a currency, usually the US dollar. USDT and USDC are the two largest by market value.
- USDT TRC-20
Tether's dollar stablecoin on the Tron network. Fees are usually low, which makes it a common choice for top-ups. Send it only to a Tron address, never on another network. See crypto payments.