# Particle, pay as you go, x402 / MPP, GET /v1/people/expertise: People search API

> Ranks the people listed under an occupation or field of research, most likely first, with their expertise as GET /v1/people/{id}/expertise describes it.

Particle's x402 / MPP plan for the people search API costs $0.30 per 1,000 people. Particle's docs list 2 of the 13 fields on our checklist: Experience, Photo.
We haven't run Particle through [our people search API benchmark](https://datacircle.dev/best-people-search-api.txt) yet.
We rank 696 plans for people search APIs by price. Half the plans cost $4.77 or less per 1,000 people. This plan costs less per 1,000 people than 81% of the 696 plans.
[Coresignal's $49 monthly plan](https://datacircle.dev/people-search-apis/coresignal/49-monthly/llms.txt) is the cheapest paid plan per 1,000 people. Coresignal's $49 monthly plan charges nothing per call. You get as many people as Coresignal's rate limit allows. [Seltz's pay-as-you-go plan](https://datacircle.dev/people-search-apis/seltz/pay-as-you-go-pay-as-you-go-post-v1-search-search-base/llms.txt) costs the least for 10,000 people a month: $0.03.
[PeopleSearch.im's $5 pack (/api/v1/search)](https://datacircle.dev/people-search-apis/peoplesearch-im/5-pack-starter-post-api-v1-search/llms.txt) covers any number of people. PeopleSearch.im's $5 pack costs less up front than Coresignal's $49 monthly plan.
[GetProspect](https://datacircle.dev/people-search-apis/getprospect/49-monthly-starter-post-v2-people-search-people-search/llms.txt), [QuickEnrich](https://datacircle.dev/people-search-apis/quickenrich/399-monthly-gtm-unlimited-get-api-employees-dataset-search/llms.txt) and [AnyAPI](https://datacircle.dev/people-search-apis/anyapi/top-up-from-10-manual-top-up-post-v1-run-people-search-quickenrich/llms.txt) are the best people search API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/people-search-apis/particle/pay-as-you-go-x402-mpp-get-v1-people-expertise
- [People lookup API: best people search providers compared](https://datacircle.dev/best-people-search-api.txt)
- Get it: https://api.particle.pro/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- Request: `GET https://api.particle.pro/v1/people/expertise`
- API key: not needed
- Its API docs: https://docs.particle.pro/api-reference/people/find-experts?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- Sold by: Particle (https://particle.pro?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 15%
- Experience: ✓
- Photo: ✓

## Price

- $ per 1,000 people: $0.30
- Per: page of 100
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## In their words

- Their pitch: Ranks the people listed under an occupation or field of research, most likely first, with their expertise as GET /v1/people/{id}/expertise describes it.

## Data

- Keep data: reasonable caching necessary for real-time display or operational functionality (6.7: You will not "download, save, or locally store Clips, Transcripts, or other API Output outside of reasonable caching necessary for real-time display or operational functionality"), on termination, delete all API Output from production systems within thirty (30) days (15.6)
- Use data: 4.1: a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to (a) access the API Services using your API Keys, (b) integrate the API Services into your Customer Applications, and (c) display API Output to end users of your Customer Applications. 5.1: You must display all attribution information included in the API Output. 6.1: You will not, and will not permit any third party to: (a) use the API Services or API Output to train, fine-tune, or otherwise develop any machine learning model, artificial intelligence system, or similar technology, (b) redistribute, resell, sublicense, or otherwise make API Output available to third parties outside of your Customer Application [...], (c) use API Output as a substitute for, or in a manner that reduces the need for end users to access, the original source content [...], (g) use the API Services for any competitive intelligence purpose or to build a product or service that competes with the API Services [...]. 6.9: You will not use the API Services for any commercial purpose unless you are subscribed to the Growth, Business, or Enterprise plan.

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: nothing required. Optional: occupation, field, standing, seniority, practicing, capacity, employer, limit, cursor
- Method: GET
- Path: /v1/people/expertise

## About the plan

- Plan: x402 / MPP
- Who can get it: non-commercial use only, the API terms' 6.9 say 'You will not use the API Services for any commercial purpose unless you are subscribed to the Growth, Business, or Enterprise plan', so commercial use needs a Business or Enterprise plan, no account or API key, each call paid in USDC on Base from a wallet (x402 or MPP)

## The 36 fields the plan's answer can hold

ID, slug, name, image URL, description, capacity, career start year, credential, experience, field code, field title, field slug, field standard, field level, field group, field parent code, occupation code, occupation title, occupation slug, occupation standard, occupation level, occupation group, occupation parent code, occupation established, occupation practicing, employer kind, employer name, employer company ID, employer company slug, employer company name, employer company domain, employer company ticker, employer company description, employer company image URL, seniority, standing

## Particle's plans (4)

- [Particle, pay as you go, x402 / MPP, GET /v1/people/expertise](https://datacircle.dev/people-search-apis/particle/pay-as-you-go-x402-mpp-get-v1-people-expertise/llms.txt): $0.30 per 1,000, 15% complete
- [Particle, $29 monthly, Individual, GET /v1/people/expertise](https://datacircle.dev/people-search-apis/particle/29-monthly-individual-get-v1-people-expertise/llms.txt): $0.029 per 1,000, 15% complete
- [Particle, $399 monthly, Business, GET /v1/people/expertise](https://datacircle.dev/people-search-apis/particle/399-monthly-business-get-v1-people-expertise/llms.txt): $0.04 per 1,000, 15% complete
- [Particle, contact us, Enterprise, GET /v1/people/expertise](https://datacircle.dev/people-search-apis/particle/contact-us-enterprise-get-v1-people-expertise/llms.txt): 15% complete

## Particle's calls for this API (2)

- `GET /v1/people/expertise`: [Particle, pay as you go, x402 / MPP, GET /v1/people/expertise](https://datacircle.dev/people-search-apis/particle/pay-as-you-go-x402-mpp-get-v1-people-expertise/llms.txt)
- `GET /v1/companies/{id}/people`: [Particle, pay as you go, x402 / MPP, GET /v1/companies/{id}/people](https://datacircle.dev/people-search-apis/particle/pay-as-you-go-x402-mpp-get-v1-companies-id-people/llms.txt)

## Particle's APIs (4)

- [Particle: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/particle/pay-as-you-go/llms.txt)
- [Particle: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/particle/pay-as-you-go/llms.txt)
- [Particle: people enrichment API pricing, 4 plans](https://datacircle.dev/person-enrichment-apis/particle/pay-as-you-go/llms.txt)
- [Particle: people search API pricing, 4 plans, GET /v1/people/expertise](https://datacircle.dev/people-search-apis/particle/pay-as-you-go-x402-mpp-get-v1-people-expertise/llms.txt)

## Particle: people search API alternatives

- [Enrich.so, $149 monthly, Scale, POST /lead-finder/search](https://datacircle.dev/people-search-apis/enrich-so/149-monthly-scale-post-lead-finder-search/llms.txt): $0.298 per 1,000, 38% complete, stored
- [RocketReach, $209 monthly](https://datacircle.dev/people-search-apis/rocketreach/209-monthly/llms.txt): $0.299 per 1,000, 38% complete
- [Oppora, $225 quarterly](https://datacircle.dev/people-search-apis/oppora/225-quarterly/llms.txt): $0.30 per 1,000, 77% complete
- [Context.dev, $9,500 yearly, Scale 2.5M, POST /v1/people/search, Search People](https://datacircle.dev/people-search-apis/context-dev/9500-yearly/llms.txt): $0.317 per 1,000, 31% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-08.

- https://api.particle.pro/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- https://api.particle.pro/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- https://api.particle.pro/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- https://docs.particle.pro/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- https://particle.pro/legal/tos-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing
- https://particle.pro/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-search-api-pricing