No KYC — no ID, no selfie, no documents. Pay in crypto: BTC, USDT, USDC, ETH, SOL, LTC
Language: English
Get an API key

36 terms · search results, APIs, AI agents, payments

SERP API glossary

Short definitions of the words that come up when you buy or use a SERP API, with a link to the page that shows the term in practice.

Last updated: · 5 min read

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 its position.

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_overview when 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_graph with its title, type, description and source.

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, gb or de. It changes which results and ads appear. See locations and languages.

hl

The interface language of the results page, such as en, fr or pt-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 location string instead, such as Denver, Colorado, United States.

google_domain

The Google site the search runs on, such as google.com, google.co.uk or google.de. SerpCrypto picks it from gl unless 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.

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.

Share of voice

The part of the visible results, clicks or impressions that a brand holds across a set of keywords, compared with its competitors.

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: Bearer header or the api_key parameter. 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.

From $0.30/1K searches · no KYC

Get an API key