Agencies use case
Clean client email lists at scale before every campaign
Agencies inherit whatever list a client hands over — messy exports, aging CRMs, purchased data of unknown quality. One bad send can burn a client’s sending domain and your relationship with it. Verifly gives you pay-as-you-go verification and bulk cleaning you can run across every client account, with an API to wire it into your own workflow.
curl -X POST "https://verifly.email/api/v1/verify/batch" \
-H "Authorization: Bearer vf_your_api_key" \
-H "Content-Type: application/json" \
-d '{"emails":["lead1@client.com","lead2@client.com"]}'Real-time SMTP mailbox checks
Single, batch, and async bulk verification
Disposable, role account, and catch-all detection
Pay-as-you-go credits with no subscription lock-in
Search fit
Built for agency email verification workflows
Use Verifly when you need a simple API, predictable pricing, and clean JSON results before emails hit your product, CRM, or campaign tool.
The agency problem: someone else’s data, your reputation
When a client onboards, they hand you a list you did not build and cannot vouch for: an ancient CRM export, a spreadsheet stitched together from three tools, sometimes purchased data of dubious provenance. You are then expected to run campaigns off it. If it is full of dead and catch-all addresses, the first send bounces hard — and it is the client’s sending domain, and your agency’s credibility, that take the hit.
Multiply that across a roster of clients and verification stops being a nice-to-have and becomes an operational safeguard. Agencies need to clean every inherited list the same way, cheaply, without negotiating a separate subscription for each client. Verifly’s pay-as-you-go model and single API let you standardize that step across the whole book of business.
How to verify client lists at scale with Verifly
Wire Verifly into your onboarding and pre-send checklist once, then run it for every client. Use the async bulk endpoint for large inherited lists and the batch endpoint for smaller ongoing top-ups. Each address comes back with a verdict plus disposable, role, and catch-all flags, so you can report list quality back to the client before you spend their reputation on a send.
- Onboard each client list by submitting it to the async bulk endpoint (up to 1,000,000 addresses).
- Standardize a pre-send gate: no campaign ships until the list has been verified.
- Segment results per client into deliverable, risky, catch-all, and undeliverable.
- Track credit spend per client and keep it pay-as-you-go with no per-account subscription.
curl -X GET "https://verifly.email/api/v1/verify?email=lead@newclient.com" \
-H "Authorization: Bearer vf_your_api_key"
# scale up to the async bulk endpoint for the full inherited listFAQ
Frequently asked questions
Why do agencies need email verification more than in-house teams?
Agencies run campaigns on data they did not create and cannot fully trust — inherited CRMs, purchased lists, messy exports. A bad send damages the client’s sending domain and your relationship with the client. Verifying every inherited list before the first campaign is the cheapest insurance against that.
Can I verify lists for many clients from one account?
Yes. You integrate Verifly once and run it across every client list, tracking credit usage per project. Because it is pay-as-you-go rather than a per-seat or per-client subscription, adding another client does not add another recurring bill.
How does pricing work for agency-scale volume?
Verifly uses public flat packs starting at $2 per 1,000 verifications and dropping to $0.60 per 1,000 at the largest pack, with credits that never expire. That lets an agency buy in bulk, draw down across clients, and avoid paying subscriptions during slow months.
Can I show clients the quality of their list?
Yes. Verifly returns a verdict and flags for every address, so you can report back how much of an inherited list is deliverable, risky, catch-all, or dead. That turns a cleanup step into a tangible deliverable and justifies the pre-send gate.
Does it fit into an existing agency workflow or tooling?
It does. The API is a single Bearer-authenticated call, so you can drop verification into whatever onboarding or pre-send automation you already run — a script, a workflow tool, or a custom dashboard — without adopting a whole new platform.
How large a list can I clean in one job?
The async bulk endpoint handles up to 1,000,000 addresses per submission, which covers even large inherited databases in a single pass. For smaller ongoing top-ups, the batch endpoint verifies up to 100 addresses per call.
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