# Mono, pay as you go, Per API call, POST /v3/lookup/tin: Company enrichment API

> Easily verify the tax identification number of an entity and obtain critical tax-related information.

Mono's Per API call plan for the company enrichment API costs $105.125 per 1,000 companies. We check each provider's docs for 13 fields. Mono's docs list 2: Headquarters, Phones.
NGN 140,000.00 per 1,000 companies is $105.125 at the Central Bank of Nigeria's rate of $0.75089 for NGN 1,000.
We haven't run Mono through [our company enrichment API benchmark](https://datacircle.dev/best-company-enrichment-api.txt) yet.
We rank 2,688 plans for company enrichment APIs by price. Half the plans cost $9.00 or less per 1,000 companies. This plan costs less per 1,000 companies than 14% of the 2,688 plans.
[ROIC.ai's $29 monthly plan](https://datacircle.dev/company-enrichment-apis/roic-ai/29-monthly/llms.txt) is the cheapest paid plan per 1,000 companies. ROIC.ai's company enrichment API costs nothing beyond the plan price. [Zodipe's PEN 45 yearly plan](https://datacircle.dev/company-enrichment-apis/zodipe/pen-45-yearly/llms.txt) costs the least for 10,000 companies a month: about $1.09.
[APIs Peru's PEN 30 (about $9) monthly plan](https://datacircle.dev/company-enrichment-apis/apis-peru/pen-30-monthly/llms.txt) covers any number of companies in Peru only. APIs Peru's PEN 30 (about $9) monthly plan costs less up front than ROIC.ai's $29 monthly plan.
[ROIC.ai](https://datacircle.dev/company-enrichment-apis/roic-ai/89-monthly/llms.txt), [Intrinio](https://datacircle.dev/company-enrichment-apis/intrinio/150-monthly/llms.txt) and [GLEIF](https://datacircle.dev/company-enrichment-apis/gleif/free/llms.txt) are the best company enrichment API providers in the Datacircle benchmark for companies in any country.

- This page: https://datacircle.dev/company-enrichment-apis/mono/pay-as-you-go-per-api-call-post-v3-lookup-tin
- [Company enrichment API: the best of 220+ providers compared](https://datacircle.dev/best-company-enrichment-api.txt)
- Get it: https://mono.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- Request: `POST https://api.withmono.com/v3/lookup/tin`
- API key: with the plan, on https://mono.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- Its API docs: https://docs.mono.co/docs/lookup/tin-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- Sold by: Mono (https://mono.co?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 15%
- Headquarters: ✓
- Phones: ✓

## Price

- $ per 1,000 companies: $105.125
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Easily verify the tax identification number of an entity and obtain critical tax-related information.

## Data

- Freshness: live
- Countries: Nigeria
- Keep data: no limit
- Use data: The Client shall not, directly or indirectly, (i) reverse engineer, decompile, disassemble or otherwise attempt to discover the source code or underlying ideas or algorithms of any relevant element of the Platform, (ii) modify, translate, or create derivative works based on the Software, (iii) rent, lease, distribute, sell, resell, assign, or otherwise transfer rights to use the relevant elements of the Platform, (iv) use the Platform for purposes not related to the rendering of the services to End-Users, (v) remove or alter any proprietary notices from the Platform or otherwise any reference to the Mono brand or name and shall not otherwise rebrand or re-badge any relevant element of the Platform without Mono’s prior written consent and on payment of such additional charges as Mono may determine, (vi) publish or disclose to third parties any evaluation of the Platform without Mono’s prior written consent, or (vii) create any link to Mono’s website, the Platform or frame or mirror any content contained on, or accessible from, the Platform, or (viii) otherwise replicate or seek to replicate the functionality or look and feel of the Platform. [...] Not to use the Platform for illegal purposes, 

## Plan

- Pay: monthly

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number, channel "tin" or "cac"
- Method: POST
- Path: /v3/lookup/tin

## About the plan

- Plan: Per API call
- Who can get it: a registered business that signs up on the Partner Dashboard and completes KYB, its account manager or Mono sales enables the Lookup endpoints

## The 10 fields the plan's answer can hold

taxpayer name, CAC registration number, FIRSTIN, JITTIN, NRS TIN, tax office, phone number, email, address, TIN type

## Mono's plans (1)

- [Mono, pay as you go, Per API call, POST /v3/lookup/tin](https://datacircle.dev/company-enrichment-apis/mono/pay-as-you-go-per-api-call-post-v3-lookup-tin/llms.txt): $105.125 per 1,000, 15% complete, live

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

- `GET /v3/lookup/cac/profile/{rcnumber}`: [Mono, pay as you go, Per API call, GET /v3/lookup/cac/profile/{rcnumber}](https://datacircle.dev/company-enrichment-apis/mono/pay-as-you-go-per-api-call-get-v3-lookup-cac-profile-rcnumber/llms.txt)
- `POST /v3/lookup/tin`: [Mono, pay as you go, Per API call, POST /v3/lookup/tin](https://datacircle.dev/company-enrichment-apis/mono/pay-as-you-go-per-api-call-post-v3-lookup-tin/llms.txt)

## Mono's APIs (2)

- [Mono: business verification API pricing, 1 plan](https://datacircle.dev/business-verification-apis/mono/pay-as-you-go/llms.txt)
- [Mono: company enrichment API pricing, 1 plan, POST /v3/lookup/tin](https://datacircle.dev/company-enrichment-apis/mono/pay-as-you-go-per-api-call-post-v3-lookup-tin/llms.txt)

## Mono: company enrichment API alternatives

- [Interzoid, pay as you go, x402 pay per call, POST /enrich, Batch Data Enrichment (business-info-domain)](https://datacircle.dev/company-enrichment-apis/interzoid/pay-as-you-go-x402-pay-per-call-post-enrich-batch-data-enrichment-business-info-domain/llms.txt): $100.00 per 1,000, 0% complete, live
- [Datacil, $1,000 pack, 80K Creditos, GET /v1/ecuador/data/company-full/{ruc}](https://datacircle.dev/company-enrichment-apis/datacil/1000-pack-80k-creditos-get-v1-ecuador-data-company-full-ruc/llms.txt): $100.00 per 1,000, 31% complete, live
- [Dabra, top-up, Prepaid, GET /api/v1/consulta/receita-federal-pj-live](https://datacircle.dev/company-enrichment-apis/dabra/top-up-prepaid-get-api-v1-consulta-receita-federal-pj-live/llms.txt): $106.24 per 1,000, 38% complete, live
- [iApp Technology, top-up from ฿445,000, Prepaid credits from 500,000 IC, GET /ekyb/live/v1/company/{company_id}](https://datacircle.dev/company-enrichment-apis/iapp-technology/top-up-from-445000-prepaid-credits-from-500000-ic-get-ekyb-live-v1-company-company-id/llms.txt): $106.54 per 1,000, 15% complete, live

## 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://docs.mono.co/docs/lookup/overview?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://docs.mono.co/docs/lookup/tin-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://docs.mono.co/docs/sandbox?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://mono.co?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://mono.co/legal?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://mono.co/lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://mono.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing
- https://support.mono.co/en/articles/11071042-updated-mono-new-product-pricing-nigeria?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=company-enrichment-api-pricing