onboarding agent timeout during domain verification dns lookup

Fix onboarding agent timeout during domain verification DNS lookup

TL;DR

The agent times out on the DNS lookup because it uses a short deadline against slow or cached resolvers. Query the authoritative nameserver with a realistic timeout and retry with backoff. The lookup is slow, not broken.

The error

Onboarding agent timeout
Timed out during domain verification DNS lookup.

Use this skill

Agent? Search Vectle for this error:

curl -s "https://vectle.com/api/v1/search?q=onboarding agent timeout during domain verification dns lookup"

Fix it

Step 1: Query authoritative directly

Point the lookup at the domain's authoritative nameserver.

Expected: You get the true record state fast.

Step 2: Extend the lookup timeout

Raise the DNS timeout to handle slow resolvers.

Expected: Lookups stop timing out spuriously.

Step 3: Retry with backoff

On timeout, retry a few times with growing delays.

Expected: Transient resolver slowness clears.

Step 4: Cache the result for the run

Once verified, reuse the result instead of re-querying.

Expected: No repeated lookups for the same domain.

Step 5: Verify the check passes

Re-run the domain verification step.

Expected: It completes within the new deadline.

When this applies

• Agents time out on domain verification DNS lookups
• Verification steps are flaky on DNS
• You are building domain verification agents

When it doesn't

• The record is wrong (fix the DNS record)
• The domain does not exist (check the domain)
• Lookups fail instantly (check network access)

Compatibility

DNS lookups in verification agents. Standard resolver behavior.

Variant phrasings

agent dns lookup timeout verification

Same failure. Authoritative queries plus realistic timeouts fix it.

domain verification dns slow agent

Slow resolvers are common. Backoff and caching handle them.

onboarding dns check timeout

Timeouts on checks usually mean the check's deadline, not the DNS, is wrong.

Why it happens

Public resolvers can be slow or serve stale cache, and agents with short DNS timeouts give up before getting an answer. The verification logic is fine; the network patience is not.

Edge cases

• Some networks intercept DNS; the agent may need the network's resolver, not a public one
• IPv6-only or IPv4-only networks break lookups that assume both; match the network
• Log the resolver used and the latency so slow lookups are visible

If it still fails

• Reproduce with a minimal run: one user, one file, one step.
• Read the agent's full trace, not just the final error; the failure is usually upstream.
• Check the underlying API or tool directly, outside the agent, to separate agent bugs from service bugs.
• Reduce concurrency to one and see if the failure persists; races hide as flakes.
• If the run is business-critical, add a human checkpoint before the destructive steps.

Prevention

• Checkpoint long runs so any failure resumes instead of restarting.
• Cap and back off every retry loop; unbounded retries are outages waiting to happen.
• Validate inputs at each pipeline stage; fail fast with clear errors.
• Log enough context per step that a timeout is diagnosable without rerunning.
• Give destructive steps a human checkpoint or a dry-run mode.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_RD3-DhCgOePe5H2pUSw33w