The Maestro alternative for Cardano and Bitcoin
Keep both chains on one API. Flat monthly pricing, requests instead of credits, and an endpoint-level migration map that gets you moved before your keys stop working.
7-day trial on Builder, then $29/mo. Card required, nothing charged before day 7.
What Maestro's announcement means for you
Their words, not ours. Three facts from the Sep 18 retirement notice, and what each one means for your integration.
On Sep 18, every endpoint is retired
Bitcoin, Cardano and Dogecoin. API keys stop working the same day. There is no grace period after the date.
Until then, everything runs as normal
Which means you can migrate calmly this week instead of during the panic days before the cutoff. Both APIs can run side by side while you switch reads over.
Open-sourcing comes after the cutoff
Their Cardano stack is promised as open source "in the coming months", after your keys are already dead. Self-hosting later is an option; it is not a migration plan for September.
The endpoint migration map
Every Maestro endpoint you call today, mapped to its Nexus destination. Swap the base URL and the auth header, keep shipping.
| Maestro endpoint | Nexus endpoint |
|---|---|
| /addresses/{addr}/utxos | /api/addresses/{address}/utxos |
| /addresses/{addr}/transactions | /api/addresses/{address}/transactions/history |
| /transactions/{tx_hash} | /api/transactions/{txHash} |
| /txmanager (submit) | /api/transactions/submit |
| /assets/{asset} | /api/assets/{unit} |
| /pools/{pool_id}/info | /api/pools/{poolId} |
| /datums/{datum_hash} | /api/scripts/datum/{datumHash} |
| btc /addresses/{addr}/utxos | /api/btc/addresses/{address}/utxos |
| btc inscriptions by address | /api/btc/addresses/{address}/ordinals |
| btc tx submit | /api/btc/txs/submit |
Following Maestro's pointer to Blockfrost? Nexus speaks the Blockfrost API too: point any Blockfrost SDK at /api/v0 and your code keeps working.
Maestro vs Nexus at a glance
Same chains, simpler math. Flat requests instead of credit weights, and a platform that is still here after Sep 18.
| Dimension | Maestro (retiring) | Nexus |
|---|---|---|
| Metering | Compute credits, per-endpoint weights unpublished | Requests. One request is one request, even the big ones |
| Entry paid plan | Conductor $49, 4M credits/mo | Builder $29, 2M requests/mo |
| Production tier | Virtuoso $199, 16M credits/mo | Scale $199, 50M requests/mo, WebSocket streaming included |
| Rate limits | 100 req/s on Conductor | 25 req/s with a 250-request burst on Builder. Growth and Scale run 50 and 100 req/s, bursts 500 and 1,000 |
| Chains | Bitcoin, Cardano, Dogecoin | Bitcoin, Cardano and Midnight, live today |
| Push data | Webhooks | WebSocket streaming, snapshot first, then live updates |
| After Sep 18 | All endpoints retired | In production, with a public status page at status.gerowallet.io |
Maestro figures from their last published pricing page. Nexus figures reflect current plans; see the pricing section for detail, including add-ons. Spot an error? Email [email protected] and we will fix it.
Migration questions, answered
How long does migrating from Maestro take?
For chain-data reads, most teams finish in a day or two using the endpoint map above: same concepts, different paths and auth header. Transaction submission is a same-day change. If you want help, ask for an engineer on the migration and you will get a named person, not a ticket queue.
What replaces MaestroProvider in my code?
The official TypeScript SDK, @adlabs/nexus on npm, covers Cardano, Bitcoin and Midnight over REST. Mesh has a merged NexusProvider, a Lucid Evolution provider PR is open, and code written against Blockfrost SDKs points at the Blockfrost-compatible endpoint at https://nexus.gerowallet.io/api/v0.
What happens to my Maestro keys on Sep 18?
Per Maestro's own announcement, every endpoint is retired and keys stop working that day, across Bitcoin, Cardano and Dogecoin. Nothing on your side survives the date. Anything still calling their API on Sep 19 fails.
Is there a free tier?
No. Nexus is paid infrastructure, from $29/mo with a 7-day trial on Builder, card required. Every plan covers Cardano, Bitcoin and Midnight on the same account, with one key per chain and network.
Move before the panic week
Both APIs run side by side until Sep 18. Start the trial today, switch reads over with the map, and be done while everyone else is still opening tickets.