10 Best APIs for B2B in Nigeria

Hunter.io is an email finding and verification platform that helps sales teams, recruiters, and marketers discover professional email addresses associated with any company domain and verify their deliverability. With over 4 million users globally, Hunter is the leading tool for B2B email prospecting, combining domain-level email discovery, individual email finding by name + company, multi-step email verification, and outreach campaign management in a single platform and REST API. In July 2025, Hunter migrated to a Unified Credits system, consolidating search, finder, and verification operations into a single monthly credit pool — simplifying budget management across teams. Also in 2025, Hunter launched an official MCP server enabling AI agents (Claude, OpenAI, Google) to interact with Hunter's API using natural language. ## What the API Does Hunter provides four core capabilities: **Domain Search**: Given a company domain (e.g., dangote.com, gtbank.com), returns all publicly findable email addresses associated with that domain, along with the email pattern used by the organization (e.g., {first}.{last}@company.com), confidence scores, and source URLs. **Email Finder**: Given a person's name and their company domain, Hunter uses its email pattern database and verification engine to find the most likely email address. Returns the email, a confidence score, and verification status. **Email Verifier**: Multi-step verification that checks email syntax, domain MX records, and mailbox existence via SMTP connection — without sending an actual email. Returns deliverability status (deliverable, risky, undeliverable, unknown) and detailed sub-checks. **Email Campaigns**: Send personalized cold email campaigns from Hunter's built-in outreach tool, with open/click tracking and automated follow-up sequences. ## How Developers Use It REST API with JSON responses and API key authentication. Example: ``` GET https://api.hunter.io/v2/domain-search?domain=gtbank.com&api_key=YOUR_KEY GET https://api.hunter.io/v2/email-finder?domain=gtbank.com&first_name=Emeka&last_name=Okafor&api_key=YOUR_KEY GET https://api.hunter.io/v2/email-verifier?email=emeka.okafor@gtbank.com&api_key=YOUR_KEY ``` Rate limits: 15 req/sec (500 req/min) for Domain Search and Email Finder; 10 req/sec (300 req/min) for Email Verifier. ## Pricing & Fees Unified Credits system (July 2025) — all operations draw from a single monthly pool: - **Free**: 50 searches/month. No credit card required. - **Starter**: $34/month (annual) / $49/month (monthly) — includes 500 searches/month. - **Growth**: $73/month (annual) / $104/month (monthly) — 2,500 searches/month. - **Business**: $244/month (annual) / $349/month (monthly) — 10,000 searches/month. - **All paid plans**: Unlimited team seats. ## Authentication API key passed as a query parameter (`api_key=YOUR_KEY`). Keys are found in the Hunter account dashboard. ## Rate Limits Domain Search and Email Finder: 15 requests/second, 500 requests/minute. Email Verifier: 10 requests/second, 300 requests/minute. These limits apply across all plan tiers. ## Compliance & Regulations Hunter.io is GDPR compliant. The platform sources email addresses from publicly available web sources (company websites, press releases, social media, etc.) — not from private databases or purchased lists. Hunter provides data subject access and deletion request support for GDPR compliance. For Nigerian deployments under NDPR, Hunter's data sourcing from public web data is generally compliant, but always confirm your specific use case with a legal review. ## Challenges & Gotchas for Nigerian Developers 1. **Nigerian business domain coverage**: Hunter's email database is strongest for international companies. Coverage of smaller Nigerian businesses and startups may be limited compared to large enterprises. 2. **Catch-all domains**: Many Nigerian corporate email domains are catch-all configured. Hunter may return emails with lower confidence scores or mark them as "risky" when the domain accepts all emails. 3. **Credits are shared across operations**: With Unified Credits, your monthly pool is consumed by domain searches, email finds, and verifications equally — budget accordingly if you need high verification volume. 4. **USD billing**: Hunter charges in USD. Nigerian teams need a USD-capable payment method. 5. **Not a list cleaning tool**: Hunter is optimized for finding and verifying individual emails, not cleaning large existing lists. Use ZeroBounce for bulk list hygiene. ## Company Background Hunter.io was founded in 2015 in Paris, France by Antoine Finkelstein and François Grante. The company grew from a simple Chrome extension to a full email prospecting and outreach platform serving over 4 million users across marketing, sales, and recruitment teams globally. ## Frequently Asked Questions **Q: Is there a free tier?** A: Yes. Hunter offers 50 free searches/month with no credit card required. **Q: What changed with the Unified Credits system in July 2025?** A: Previously, Hunter had separate Search Credits and Verification Credits pools. The July 2025 update consolidated these into a single monthly credit pool used by all operations. **Q: Does Hunter have a Nigerian business email database?** A: Yes, though coverage is stronger for large Nigerian enterprises (banks, telcos, multinationals) than for smaller local businesses. **Q: Can I use Hunter with AI coding tools?** A: Yes. Hunter launched an official MCP server in 2025 enabling Claude Code, OpenAI agents, and Google AI to interact with Hunter's API using natural language.

Duplo is an API-first financial operating system for African businesses, providing a unified platform for B2B payments, expense management, virtual accounts, FX transfers, and NRS-compliant e-invoicing. Headquartered in Victoria Island, Lagos, Duplo is CBN PSSP-licensed, PCI DSS certified, ISO 27001 and 22301 certified, and NDPR-compliant. In early 2026, Duplo became one of the first Nigerian companies to secure dual NRS (Nigerian Revenue Service) licences for e-invoicing — a critical milestone as Nigeria moves toward mandatory digital invoicing for tax compliance. What the API Does The Duplo API enables businesses to: issue and manage virtual bank accounts; initiate bulk payments to up to 500 recipients simultaneously; process local and international card payments; perform FX conversions in 80+ currencies across 160+ countries; automate expense approval workflows with budget controls; perform auto-reconciliation of transactions; and generate NRS-compliant e-invoices. The platform is designed as both a business tool and an embeddable API layer for fintechs and platforms. How Developers Use It Developers access documentation at developers.tryduplo.com. Authentication uses API keys with clear environment prefixes: dp_test_ for test mode, dp_live_ for live mode. The API is REST-based with JSON payloads over HTTPS. All API calls must be made over HTTPS. Developers must complete compliance requirements before being granted live mode access. A sandbox environment is available for full testing. Pricing Local card transactions: 1.5% capped at approximately ₦1,200–₦1,300. International card transactions: 3.8%–4.0%. Custom volume tiers available for high-volume international processing. Contact Duplo for enterprise pricing. Authentication API keys are managed via the Duplo Dashboard. Test mode uses dp_test_ prefixed keys; live mode uses dp_live_ prefixed keys. Never share live keys publicly. Compliance CBN PSSP-licensed, PCI DSS, ISO 27001, ISO 22301, NDPR-compliant, and NRS dual-licensed for e-invoicing. Duplo is also expanding into South Africa via a partnership with Ozow for instant EFT payments. Challenges and Gotchas (1) Live mode requires completing compliance requirements — not instant. (2) Rate limits not publicly documented. (3) The NRS e-invoicing feature is relatively new and developers should check docs for current implementation status. (4) Duplo is B2B focused — not designed for high-volume consumer checkout flows. (5) International card fees (3.8–4%) are higher than local card fees. Company Background Duplo was founded in Nigeria by Yele Oyekola and Damola Ajao and is backed by prominent African and global VCs. The company is focused on solving the complexity of B2B financial operations in Africa, where businesses often manage payments through manual bank transfers, spreadsheets, and fragmented tools. Duplo consolidates this into a single API-first platform. FAQs Q: Does Duplo support bulk payments? A: Yes. Duplo supports bulk payments to up to 500 recipients in a single API call. Q: What is the fee for local card payments? A: 1.5% capped at approximately ₦1,200–₦1,300 per transaction. Q: Is there a sandbox? A: Yes. Test mode is available using dp_test_ API keys from your dashboard. Q: Does Duplo support e-invoicing for Nigerian tax compliance? A: Yes. Duplo holds NRS dual licences for NRS-compliant e-invoicing — one of the first Nigerian companies to do so. Q: Can Duplo handle international payments? A: Yes. Duplo supports 80+ currencies across 160+ countries with international card acceptance at 3.8–4.0%. Duplo's NRS-compliant e-invoicing capability supports Nigerian businesses' obligations under the Federal Inland Revenue Service's e-invoicing requirements, allowing platforms to generate and submit compliant electronic invoices as part of the B2B payment workflow rather than as a separate process.

Fincra is a CBN PSSP-licensed payment gateway and fintech infrastructure company enabling African businesses to collect payments locally and cross-border across 50+ currencies in 40+ countries — with a single API covering 150+ countries globally. Fincra processes millions of API requests monthly and provides checkout, virtual accounts, direct debit, and cross-border payment products to businesses ranging from startups to enterprise clients. The company maintains a dedicated developer hub at FincraHub for the Nigerian and African developer community. What the API Does The Fincra API enables developers to: process card payments (Verve, Visa, Mastercard), bank transfers, M-Pesa, mobile money, and PayAttitude; issue multi-currency virtual accounts (NGN, USD, GBP, EUR) for collections from anywhere in the world; set up direct debit mandates for recurring collections from Nigerian bank accounts; initiate cross-border payouts in 50+ currencies; and receive real-time webhook notifications for all transaction events. The platform is designed as a single integration point for both local Nigerian payments and pan-African/international payment needs. How Developers Use It Developers access documentation at docs.fincra.com. Account creation is at fincra.com. Authentication uses API keys obtained from the Fincra Dashboard under Settings > API keys and webhook configuration tab. Sandbox and live environments are fully isolated — separate business IDs, API keys, and identifiers for each. Never use live credentials in the sandbox environment. The sandbox is available for full integration testing with simulated data. Pricing Custom pricing based on product type, transaction volume, markets, and risk profile. No public fee schedule. Contact Fincra sales to design a custom package. The pricing page at fincra.com/product-pricing offers a starting point for conversations. Rate Limits 50 API calls per second. HTTP 429 error returned for requests exceeding this limit. Authentication API keys from the Fincra Dashboard, separated by environment (sandbox vs. live). Keys are configured in the Profile > Settings > API keys section. Compliance CBN PSSP-licensed in Nigeria. Fincra is also incorporated in the US (Fincra Inc.) and holds appropriate licences for cross-border operations. Handles M-Pesa and mobile money under applicable East African regulations. Challenges and Gotchas (1) Pricing requires a sales conversation — no instant self-serve pricing. (2) Sandbox and live environments are fully isolated — you cannot transfer test accounts to live. (3) Rate limit of 50 req/sec may constrain high-frequency use cases — design API calls with batching in mind. (4) No USSD support. (5) Cross-border payouts pricing may vary significantly by corridor. Company Background Fincra Inc. is incorporated in the US and operates its Africa business from Lagos, Nigeria. The company is focused on solving Africa's payment fragmentation problem — where businesses traditionally needed separate integrations for each country. Fincra's FincraHub developer community is active in the Nigerian tech ecosystem. FAQs Q: What is Fincra's rate limit? A: 50 API calls per second. Exceeding this returns HTTP 429. Q: Does Fincra support M-Pesa? A: Yes. M-Pesa is supported as a payment method for East African collections. Q: Are sandbox and live environments the same? A: No. They are fully isolated with separate business IDs, API keys, and identifiers. You cannot transfer test data to live. Q: Does Fincra support direct debit for subscriptions? A: Yes. The Direct Debit API enables recurring collections from Nigerian bank accounts on a schedule.