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!
The Public RPC Bounty Tender 5 Requirements Document is now available so providers have sufficient time to review the scope and prepare submissions ahead of the application window.
Public RPC Bounty — Tender 5 Requirements Document
Tender 5 improves the scope of Tender 4 and covers all major Relay and System chains in the Polkadot and Kusama networks.
Providers may submit offers for one or more of the following networks:
Polkadot Networks
• Polkadot — 4 providers
• Polkadot AssetHub — 6 providers
• Polkadot BridgeHub — 2 providers
• Polkadot Collectives — 1 provider
• Polkadot Coretime — 1 provider
• Polkadot People — 3 providers
• Polkadot Bulletin — 2 providers
Kusama Networks
• Kusama — 2 providers
• Kusama AssetHub — 1 provider
• Kusama BridgeHub — 1 provider
• Kusama Encointer — 1 provider
• Kusama Coretime — 1 provider
• Kusama People — 1 provider
Testnet
• Westend Testnet — 1 provider
Key Dates — Tender 5
• 3 June 2026 — Start of Tender 5 application process
• 20 June 2026 — Tender hash submission deadline, 23:59 UTC
• 23 June 2026 — Full tender document submission deadline, 23:59 UTC
• 28 June 2026 — Completion of scoring
• 30 June 2026 — Announcement of selected providers
• 30 June 2026 — End of Tender 4
• 1 July 2026 — Start of Tender 5 service period
• 1 December 2026 — Start of Tender 6 application process
• 31 December 2026 — End of Tender 5
• 1 January 2027 — Start of Tender 6 service period
Important note on pricing
Each tender must include a clear and final cost breakdown for every Relay and System chain proposed.
Conditional pricing will not be accepted. This includes any pricing structure such as “if A, then price B” or “if C + D are selected, then price E”. All submitted prices must be final, standalone, and directly scorable by curators.
Any tender containing conditional pricing may be rejected from the scoring process.
Thank you to all providers for the services delivered during Tender 4. We look forward to receiving your submissions for Tender 5.
Thank you to all service providers who participated in Tender 5 and submitted proposals. This round continues the scope established in previous tenders and maintains RPC coverage across the core Relay and System chains in the Polkadot and Kusama networks.
For Tender 5, we received a total of 10 tenders from service providers, offering 175 RPC services across 13 networks. Curators independently evaluated and scored each submission using the criteria defined in the Tender 5 Requirements Document.
In total, 23 RPC endpoints were awarded to 10 unique providers for the six-month tender period.
Final Results Summary:
* Polkadot services: $6,109.34 / month
* Kusama services: $1,391.39 / month
* Testnet services: $100.00 / month
* Total cost: $7,600.73 / month
This round achieved a 70.02% reduction in total monthly costs, together with a 31% reduction in the number of endpoints across all core Relay and System chains, while maintaining required network coverage.
The full document includes the scoring summary, selected providers per chain, and detailed cost breakdown:
The Public RPC Bounty Tender 5c Requirements Document is now available, and applications are open.
Tender 5c is a temporary expansion of the existing RPC provision, covering an eight-month service period from 1 November 2026 to 30 June 2027. It may be terminated early if the additional resources are no longer needed.
These allocations are additional to the existing Tender 5 scope. Each slot must include at least one dedicated RPC node.
For AssetHub and People, providers may offer up to two additional nodes, with each node priced separately. Curators may select one, both or neither, depending on the offers received and their evaluation.
Provision of the additional Bulletin nodes is still pending confirmation. An update will be shared in the coming days.
Key Dates — Tender 5c
• 13 October 2026 — Start of the application process
• 18 October 2026 — Tender hash submission deadline, 23:59 UTC
• 19 October 2026 — Full tender document submission deadline, 23:59 UTC
• 25 October 2026 — Completion of scoring
• 26 October 2026 — Announcement of selected providers
• 1 November 2026 — Start of the service period
• 30 June 2027 — Scheduled end of Tender 5c
Pruning and Storage Requirements
Asset Hub and People nodes may be pruned, reducing disk requirements. 128 GB NVMe storage per node should be sufficient, as specified in the requirements document.
Bulletin has a separate storage specification, currently listed as 8 TB enterprise-grade NVMe. Please review the network-specific requirements when preparing your offer.
Note on Pricing
Each tender must include a clear, final monthly cost breakdown for each proposed chain and node allocation.
Conditional pricing will not be accepted. Prices must be standalone and directly scorable, without depending on the selection of other nodes or networks. Tenders containing conditional pricing may be rejected from scoring.
Please review the document carefully and follow the required hash and full-document submission process. Given the short application window, providers should prepare submissions promptly and be ready to deliver services from 1 November.
Thank you to all providers for your continued support. We look forward to receiving your submissions.
Polkadot Chains:
Kusama Chains:
Westend Testnet:
Key Tender 3 Dates:
Key Dates — Tender 5
[Public RPC Bounty — Tender 5c Requirements Document](
Pruning and Storage Requirements