The Public RPC Bounty program announces new tender rounds to onboard RPC service providers for Polkadot and Kusama. This is a prime opportunity to showcase your skills and contribute to blockchain innovation. Key highlights include:
Key Dates: Submission deadlines begin on 19th Jan 2025, with announcements on 29th Jan 2025. Tender 2 starts 1st Feb 2025 and ends 31st July 2025.
Eligibility: Proof of incorporation, expertise in RPC services, and operational readiness.
Service Standards: 99% uptime, <200 ms latency, and adherence to strict SLAs.
For more details on submission requirements, scoring criteria, and timelines, read the full document here.
Interested parties can join the group via the following link: Telegram Group
Thank you to all the providers for submitting their proposals for this tender round. Over the past week, curators have been thoroughly reviewing the submissions. The competition was incredibly close, with many decisions coming down to the smallest details.
During Tender Round 2 , we received a total of 8 tenders . The results, including the winning tenders for each chain, the selected service providers, their final scores, and the cost for their services, are available here.
We sincerely thank all service providers for their participation and for the excellent services delivered to support the network. Congratulations to the winning providers on their successful tenders.
We’re pleased to announce that the Public RPC Bounty Tender Document has been officially updated to include several new system chains under the additional Tender 2B round.
This short-term tender will follow a similar process to previous rounds and is aimed at expanding coverage across additional networks in both the Polkadot and Kusama ecosystems.
Thank you to all the providers for submitting their proposals for this tender round. Curators have now completed the evaluation, with each submission reviewed and scored independently based on the published criteria.
During Tender 2B, we received a total of 9 tenders , covering 36 RPC services . After review, 2 service providers were selected to deliver 6 RPC endpoints across Polkadot and Kusama system chains.
Two tenders were disqualified due to eligibility issues:
OnFinality: Did not connect to the usage monitor before April 15th
RadiumBlock: Missed the monitor connection deadline, hash submission, and tender document deadline
The full Tender 2B results document is now available and includes the winning tenders for each chain, selected service providers, final scores, and costs.
The total monthly cost for all selected services is $856.32 , with the following breakdown:
Tender 3 consolidates the scope of Tender 2 and Tender 2B, and expands it to cover all major Relay and System chains in the network. Providers may submit offers for one or more of the following networks:
Key Tender 3 Dates:
1st July 2025 – Start of Tender 3 application process
20th July 2025 – Tender hash submission deadline (23:59 UTC)
23rd July 2025 – Full tender document submission deadline (23:59 UTC)
28th July 2025 – Completion of scoring
30th July 2025 – Announcement of selected providers
31st July 2025 – End of Tender 2 & Tender 2B
1st August 2025 – Start of Tender 3
1st January 2026 – Start of Tender 4 application process
31st January 2026 – End of Tender 3
1st February 2026 – Start of Tender 4
This tender follows the same format and evaluation criteria as the previous round. Note: Each tender must include a clear and final cost breakdown for every Relay and System chain proposed.
Thank you to all service providers who participated in Tender 3 and submitted proposals. This round consolidates the scope of Tender 2 and 2B and expands coverage to include all active Relay and System chains in the Polkadot and Kusama networks.
For Tender 3, we received a total of 8 tenders, offering 91 RPC services across 13 different networks. Curators independently evaluated and scored each submission using the same criteria from the Tender 3 Requirements Document.
This was also the first round where we formally included scoring based on real RPC usage data, sourced from the shared usage monitor. Providers with higher monthly traffic over April–June 2025 received higher scores. Inactive or new providers received a neutral usage score.
Reminder for New Providers
Connect your RPC service to the SLA monitor as early as possible. This is required for scoring based on usage metrics.,
*Initiate a PR to add your endpoint to Polkadot.js so that your service is publicly accessible and visible in the UI.
Final Results Summary:
Polkadot Services: $17,357.80/month,
Kusama Services: $9,404.00/month,
Westend Testnet: $120.00/month,
Total Cost: $26,881.80/month,
That’s a 17.41% total reduction in cost compared to the previous round, while maintaining full network coverage.
The full document includes the scoring summary, selected providers per chain, and cost breakdown: Tender 3 Results Document
Thank you again to all participants, and congratulations to the selected providers!
Polkadot Chains:
Kusama Chains:
Westend Testnet:
Key Tender 3 Dates: